Suppose Spain produces only cars and trucks. The resources that are used in production of these two goods are not specialized- that is, the same set of resources is equally useful in producing both cars and trucks. The shape of Spain's production possibilities frontier (PPF) should reflect the fact that as Spain produces more trucks and fewer cars, the opportunity cost of each additional truck:
A. decreases
B. increases
C. remains constant

Question

Suppose Spain produces only cars and trucks. The resources that are used in production of these two goods are not specialized- that is, the same set of resources is equally useful in producing both cars and trucks. The shape of Spain's production possibilities frontier (PPF) should reflect the fact that as Spain produces more trucks and fewer cars, the opportunity cost of each additional truck:
A. decreases
B. increases
C. remains constant