Providing emergency liquidity to banks that are solvent but short on cash is what the central bank does as a last resort. When funding dries up and confidence falters, the central bank can supply liquidity quickly, often in the form of cash or credit secured by collateral, so banks can meet withdrawals and continue payments. This ability to inject cash into the system helps prevent a bank run from spiraling into a broader crisis. The label cash reserve fits this idea because it embodies the central bank’s capacity to supply immediate liquidity to banks in distress. The other options don’t capture this role: tax revenue is government income, an insurance fund protects individuals from risk rather than backstopping banks’ liquidity, and an investment fund is about allocating assets for returns rather than stabilizing the banking system.

Economies of scale means average cost per unit falls as output rises. As a firm increases production, fixed costs are spread over more units, making each unit cheaper. In addition, larger production allows bulk purchasing, better utilization of machinery, and greater specialization of workers, all of which boost efficiency and lower the cost per unit. It’s common for total costs to still increase with more output, but the cost per unit drops over a range of increasing production. Be aware that beyond some point, average costs can rise again due to diseconomies of scale (such as coordination problems or management inefficiencies). The other statements don’t capture this idea: total cost does not need to fall as output increases, and the long-run concept is about average costs changing with scale while some costs can be fixed or variable depending on the level of output.

A Forward Rate Agreement is a contract between two parties to lock in the interest rate for a loan that will start on a specified future date and run for a defined period. The agreed forward rate determines the interest payments for that future period, and at settlement the difference between the forward rate and the prevailing market rate is paid in cash on the notional amount. No principal changes hands, which is typical for FRAs. This setup specifically fixes the rate for a future start date, which is exactly what the question describes. A government bond forward fixes the price of a bond in the future, not the rate for a future borrowing period; interest rate futures are standardized, exchange-traded contracts with daily settlements; sinking funds are reserves set aside to repay debt, not rate-setting contracts.

Primary stakeholders are those with a direct stake in what the business does and in its outcomes. They are not just customers; they include internal stakeholders—people inside the organization like employees and managers—and connected stakeholders—external groups that have a direct relationship with the business, such as suppliers, lenders, investors, and other parties tied to its operations. Because their interests are directly affected by the company’s actions, these groups can influence decisions and are central when evaluating how the business performs. The other options miss the full picture: focusing only on customers ignores internal staff and other direct relationships; calling out only external parties excludes internal stakeholders; and saying they have no direct influence contradicts the idea of a direct stake.

Counter trading hedges by exchanging real goods or services instead of using money or financial instruments. The idea is to balance out the exposure by agreeing to a return trade of equal value, so the net cash flow or currency risk is reduced without relying on a cash payment at a future date. This approach is common in international trade when currencies are volatile or access to foreign currency is limited, since the offset comes from an actual barter rather than a monetary hedge. For example, a company might supply machinery in exchange for raw materials from a partner, with both sides ensuring the values are aligned, thereby mitigating exposure to price or currency movements. Currency options and forward contracts, on the other hand, use financial instruments to manage currency risk, not the exchange of real goods. Netting is about simplifying settlements among related parties by offsetting receivables and payables, rather than creating an offset through physical goods exchange.