Suppose the Consumer's Indifference Curves Are Concave (I

Multiple Choice

Suppose the consumer's indifference curves are concave (i.e.,bowed away from the origin) instead of convex.In this situation,

A) along an indifference curve,the marginal value of X is falling as more X and less Y is consumed.
B) all baskets on the budget line give the consumer the same level of satisfaction.
C) the marginal value of X must equal P_X/P_Y at the consumer's optimum.
D) the consumer's optimum is always a corner solution.