Answer: (C) When a country's real exchange rate appreciates, it imports more and exports less, causing its net exports to fall.
Step-by-step explanation:
When a country's real exchange rate appreciates i.e the value of its currency increases, it imports more because more products could be bought with the same amount of the currency as a result of its increased value, and it export less because their goods would become more expensive for other countries resulting in reduced demand. Therefore, resulting in the fall of its net export. This is a form of trade balance.