When economists describe the theory of consumer choice, they

a$.$ portray people as simple and methodical with perfectly predictable patterins of behavior.

b$.$ assert that consumers decide which goods and services give them the greatest utility within their limited incomes.

c$.$ point out that consumers rarely consider utility in their purchase decisions; they look at other factors like convenience, peer behavior, and price.

d$.$ assert that the retail price is the only variable consumens really constder in making their purchasing decisions.

e$.$ admit that consumer behavior is random and there is no credible economic theory to explain the phenomenon.