Refer to Table 10-2. Holding prices constant, when Keira's income changed from $18 to $23, what happens to her total utility and to the marginal utilities of the last cup of soup and the last sandwich purchased?

A) Her total utility and the marginal utility of the last sandwich consumed increase but marginal utility of the last cup of soup consumed decreases.
B) Her total utility and the marginal utility of the last cup of soup consumed increase but marginal utility of the last sandwich consumed decreases.
C) Her total utility decreases but the marginal utilities of the last cup of soup and the last sandwich consumed increase.
D) Her total utility, the marginal utility of the last cup of soup consumed, and the marginal utility of the last sandwich consumed all increase.
E) Her total utility increases but the marginal utilities of the last cup of soup and the last sandwich consumed decrease.

E