On a Production Possibilities Frontier Showing Possible Output Levels of Good

Multiple Choice

On a production possibilities frontier showing possible output levels of good A and good B, the opportunity cost of producing the first 10 units of A will usually be

A) the same as the opportunity cost of producing the second 10 units of A
B) less than the opportunity cost of producing the second 10 units of A
C) greater than the opportunity cost of making the second 10 units of A
D) 10 units of A
E) 10 units of B