看了前面的答案，助教源的几个答案对A和C有矛盾的回答~

问题如下：

The exchange rate of Country A's currency relative to the US dollar is 1.5, and the exchange rate is fixed at any time. Country A issues domestic currency but also accept US dollars in many businesses. The description of exchange rate regime of Country A is:

选项：

A.

a fixed peg.

B.

dollarization.

C.

a currency board system.

解释：

C is correct.

A currency board system is to exchange domestic currency for another foreign currency at a fixed exchange rate. Country A issues its own domestic currency therefore is not dollarization. A fixed peg allows a margin of deviation from the target exchange rate.

考点：Exchange Rate Regimes

解析：货币发行局制度是以固定的汇率将本国货币兑换成另一种外国货币。所以C选项正确。

A国发行本国货币因此不是美元化。所以B选项不正确。

固定汇率制允许与目标汇率有一定的偏差。