Given Two Goods,X and Y,their Prices,PX and PY,a Consumer Is

Multiple Choice

Given two goods,X and Y,their prices,PX and PY,a consumer is in equilibrium when the last dollar spent on X yields

A) zero marginal utility for Y.
B) the same marginal utility as if all the money were spent on Y.
C) a smaller marginal utility than the last dollar spent on Y.
D) the same marginal utility as the last dollar spent on Y.
E) none of the above