Suppose an economy with two goods (candy and desk) and two identical a

Suppose an economy with two goods (candy and desk) and two identical agents that is in a competitive equilibrium. The marginal cost of a piece of candy is given by MCc = 4Qc and the marginal cost of a desk is MCd = 2 + Qd. The current production level of candy (Qc) is 4 pieces and of desks (Qd) is 30. What can be said about the marginal utility of candy (MUc) and the Marginal utility of desks (MUd)?

A) 3MUc = MUd
B) MUc = 0.5MUd
C) MUc = MUd = 4
D) MUc = 2MUd

ANSWER

D