请帮忙解释一下这道题 谢谢

问题如下：

QuestionProduct differentiation is most significant under which of the following market structures?

选项：

A.Fiscal policy only

B.Monetary policy only

C.Both fiscal policy and monetary policy

解释：

1. Incorrect. Fiscal policy pertains to the government's decisions about taxation and spending, and it is not directly related to the quantity of credit in an economy.
2. Correct. Monetary policy refers to central bank activities that are focused on influencing the quantity of money and credit in an economy.
3. Incorrect. Fiscal policy is not directly related to the quantity of credit in an economy; it is concerned with government taxation and spending decisions. Monetary policy, on the other hand, is directed towards managing the money supply and credit in an economy.

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