Answer:
C) U.S. manufacturers tend to reduce purchases from foreign sources.
Step-by-step explanation:
When the US currency is weak, foreign products are more expensive, since you need more US dollars to buy the same amount of products as before.
The laws of supply and demand works for all products, domestic and imported. As the price of imported products increases, their domestic demand will decrease.
The combination of lower demand and more expensive products will always equal lower imports.
When the US dollar is strong, the opposite happens.