The key factor distinguishing retailers from other members of the supply chain is that they

A) sell to consumers, businesses, and government.
B) utilize marketing to reach consumers.
C) use advertising to generate demand.
D) rarely engage in personal selling.
E) sell to customers for their personal use.

An indifference map implies that

A) money income is constant, but the prices of the two products vary directly with the quantities purchased.
B) the two products under consideration are perfectly substitutable for one another.
C) a consumer is better off to be at some point high on a given curve as opposed to a point low on the same curve.
D) curves farther from the origin yield higher levels of total utility.