Ap economics question (can someone explain to this to me please? thanks <3)

Question

Suppose the seventh carrot you consume provides a marginal utility of 3 utils and the eighth carrot provides a marginal utility of 2 utils. If you consume the eighth carrot your total utility will

a) decrease by 2.

b) decrease by 5.

c) increase by 2.

d) decrease by 1.

e) increase by 1.

Answer 1

Marginal utility adds to total utility. Since the 8th carrot provides 2 utils, the total utility will increase by 2. The answer is C.