Shelley Is Maximizing Utility in Her Consumption of Mansions and Porsches

Multiple Choice

Shelley is maximizing utility in her consumption of mansions and Porsches. If the marginal utility of her last purchased mansion is twice the marginal utility of her last purchased Porsche, then we know

A) Shelley buys twice as many mansions as Porsches.
B) Shelley buys twice as many Porsches as mansions.
C) Shelley buys more Porsches than mansions, but we do not know how many more.
D) the price of a mansion is twice the price of a Porsche.
E) the price of a Porsche is twice the price of a mansion.