初經：生產可能邊界的機會成本計算

題目)參照上圖生產可能性邊界。假如一國家由點a移至點c，試問此位移之機會成本為
A)3千萬(30million)資本品。
B)2千萬(20million)資本品。
C)1千萬(10million)資本品。
D)1千萬(10million)消費品。
請問答案為何是B)20million的資本品，而不是A)30million的資本品呢?

原題)Refer to the production possibilities frontier in the figure above. If the country moves from point a to point c, the opportunity cost of the move is

A) 30 million capital goods.

B) 20 million capital goods.

C) 10 million capital goods.

D) 10 million consumption goods.

Answer:  B