The Reason Individual Demand Slopes Downward Is That

Multiple Choice

The reason individual demand slopes downward is that

A) market demand slopes downward.
B) a fall in price causes marginal utility to fall.
C) when price falls, an individual consumes more in order to use all of his or her income.
D) when price falls, total utility can be increased when more of the good is purchased.
E) when price rises, total utility can be increased when more of the good is purchased.