I need help on this question on my final exam review, thanks.
Question: The United States Balance of trade has:
a. shown a surplus since the 1980s.
b. been in deficit since the 1980s.
c. gone from a surplus in the 1980s to a deficit in the 1990s back to a surplus since 2000.
d. gone from a deficit in the 1980s to a surplus in the 1990s back to a deficit since 2000.