If a linear, two-good production possibilities curve has a slope of ?2, then:

A.you have an absolute advantage in the good measured on the vertical axis.

B.you have a comparative advantage in the good measured on the vertical axis.

C.having an additional unit of the good measured on the vertical axis means giving up ? of an unit of the good measured on the horizontal axis.

D.having an additional unit of the good measured on the vertical axis means giving up 2 units of the good measured on the horizontal axis.

正确答案：having an additional unit of the good measured on the vertical axis means giving up ? of an unit of the good measured on the horizontal axis.