If a nation exports more than it imports, it is said to have
a. a trade surplus.
b. negative balance of trade.
c. a trade deficit.
d. positive balance of trade

The answer to the question is a. a trade surplus.

If the nation or country exports more than it imports, it is called trade surplus which is a favourable balance of a trade. If its the other way around or the opposite, the nation imports more than it exports, it's called trade deficit.

The answer should be a.