Answer:
B. French wines will become more expensive in the United States.
Explanation:
Exchange rate is the rate at which one currency can be exchanged for another during international trade. The strength of a currency determines how much of the other countrie's goods it can purchase.
When the strength of a countrie's currency is high it will purchase more of the other countrie's goods. If however the currency is weak, it will take more to buy the other countrie's goods.
In this case if the dollar falls against the euro, it will take more dollars to buy French wine than before.
For example if a bottle of French wine was $500, after the fall the price may now be $800.