18) Suppose that a typical German factory can produce 20 cameras or 1 computer in an hour, and that a typical American factory can produce 10 cameras or 1 computer in an hour. The opportunity cost of 20 cameras in terms of computers in Germany is

A) 10 computers per camera.B) 1 computer per camera.

C) 1/20 of a computer per camera.D) 2 computers per camera.