Refer to the Following Figure

Multiple Choice

Refer to the following figure:

The consumer's income is $800.
-Why doesn't the consumer choose the combination at point B?

A) The consumer is willing to give up more X for additional units of Y than the rate in the market.
B) The marginal utility of Y exceeds the marginal utility of X.
C) The marginal utility per dollar spent on Y exceeds the marginal utility per dollar spent on X.
D) both a and c
E) both b and c