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 A,what is the (approximate) cost of producing one more quirk?

A) 100 quarks.
B) 50 quarks.
C) 25 quarks.
D) 200 quarks.
E) One more quark.