Refer to the table, which gives five points on a nation's PPF. The numbers in the table demonstrate that:}
A) the economy illustrated has a comparative advantage in X.
B) the opportunity cost of producing an additional unit of Y increases as the production of Y increases.
C) the economy illustrated has a comparative advantage in Y.
D) the opportunity cost of producing an additional unit of Y decreases as the production of Y increases.
Answer: B