The difference between a country's exports and imports is called the country's trade balance. If one country had a trade balance of - $86 billion in 1991, $142 billion in
1995, and - $43 billion in 1994. What was the total trade balance for these years?
A. -271 billion dollars
OB. 271 billion dollars
O C. 13 billion dollars
O D . -13 billion dollars