The Graph Below Is Mendork's Production Possibility Curve for the Only

Multiple Choice

The graph below is Mendork's production possibility curve for the only two goods that it produces-quirks and quarks.

-Refer to the graph above to answer this question.If Mendork's current production is at point B,what is the opportunity cost of one more quark as output changes from point B to A?

A) 0.04 quirks.
B) 4 quirks.
C) 400 quirks.
D) 1 quirk.
E) 0.4 quirks.