If a Runner's Demand for Bottled Water Increases, and the Market

Multiple Choice

If a runner's demand for bottled water increases, and the market price remains unchanged, the runner's consumer surplus

A) falls because the difference between what the runner is willing to pay and price decreases
B) falls because the marginal utility of bottled water falls when the demand curve shifts to the left
C) remains constant because price doesn't change
D) increases
E) is zero