Economists Usually Assume That People Act in a Rational, Self-Interested

Economists usually assume that people act in a rational, self-interested way.In explaining how consumers make choices this means that economists believe

A) consumers will always buy goods and services at the lowest possible prices.
B) consumers spend their incomes to order to accumulate the most goods and services.
C) consumers make choices that will leave them as satisfied as possible given their incomes, tastes, and the prices of goods and services available to them.
D) consumers will spend their incomes and time on activities that benefit themselves as much as possible, without regard to the welfare of others.