If Only Two Products Are Produced in an Economy,wheat and Wine,the

If only two products are produced in an economy,wheat and wine,the opportunity cost of producing a gallon of wine equals the

A) gain in wine divided by the loss in wheat.
B) loss in wheat divided by the gain in wine.
C) opportunity cost of producing a wine.
D) gain in wheat divided by the loss in wine.
E) loss in wine divided by the gain in wheat.