问题如下：
Counterparty A is an American company with manufacturing operations in Indonesia and its main customers in the United States, while counterparty B is an American company that manufactures its goods domestically and exports solely to Indonesia. Which one of the following transactions with either counterparty will be a wrong-way exposure for a bank?
选项：
A.A five-year plain-vanilla IDR/USD cross-currency swap between the bank and counterparty A where the bank is USD interest rate receiver
B.A five-year plain-vanilla IDR/USD currency option sold by the bank to counterparty A for it to buy IDR at a certain rate
C.A five-year plain-vanilla IDRAJSD cross-currency swap between the bank and counterparty B where the bank is USD interest rate receiver
D.A five-year plain-vanilla IDR/USD currency option bought by the bank from counterparty B for the bank to buy IDR at a certain rate
解释：
C is correct. This is an example of a wrong-way exposure, where a gain on the instrument for the bank is associated with a higher probability of default (PD) for its counterparty. If the IDR depreciates, counterparty A will make a profit because its costs will go down in dollars; conversely for counterparty B, because its dollar revenues will decrease. Under c., the company pays USD and receives IDR. This transaction will create a loss if the IDR depreciates. In this situation, counterparty B will lose money as well on its exports. Hence, this is a wrong-way trade.
请问这道题如何理解呢？
