One of the main functions of the European Central Bank (ECB) is:

• A. Setting wholesale lending interest rates in the Eurozone area
• B. Fixing the exchange rate of the Euro against other currencies
• C. Setting rules for financial institution dealings with consumers
• D. Supervising the solvency of life assurance companies

Answer: (A)

The main idea is that the ECB conducts monetary policy for the euro area, using policy rates to influence the cost of funds for banks in wholesale markets. By adjusting these rates, the ECB shapes wholesale lending rates that banks charge to each other and to large borrowers, which in turn affects overall lending, spending, and price stability in the economy. The other options describe functions that aren’t the ECB’s primary role: fixing the euro’s exchange rate is not something the ECB sets outright, it may intervene but does not fix rates; consumer protection rules for financial institutions fall to other EU/regulatory bodies; and supervising the solvency of life insurance companies is an insurance-regulation task, not the ECB’s main remit.