NAFTA creates a free trade area in North America. However, Mexican avocado growers:
A) cannot hire illegal immigrants.
B) can only ship avocados to the United States in winter months.
C) have no quotas for the quantity of avocados shipped to the United States.
D) cannot impose tariffs of their own.
E) None of the above
Answer: B) can only ship avocados to the United States in winter months.