Which of the following statements about the idea that people are rational is​ correct?

A. The idea assumes that consumers and firms use all available information as they act to achieve their goals.
B. The idea assumes that consumers and firms always make correct decisions.
C. The idea assumes that consumers and firms take into account the costs of their actions but ignore the benefits.
D. The idea assumes that consumers and firms take into account the benefits of their actions but ignore the costs.