The correct answer is A. Rational.
Economic analysis expects the consumer to behave in a manner that is rational. This means that the consumer will make choices that are in their best interests, given their limited resources. The consumer will weigh the costs and benefits of different options and choose the one that gives them the most satisfaction.
The consumer may not always be able to make perfectly rational choices. They may be influenced by emotions, or they may not have all the information they need to make a decision. However, economic analysis assumes that the consumer will try to make the best choices they can, given the information they have.
The other options are incorrect because they do not describe the way that economic analysis expects the consumer to behave.
Option B, irrational, means that the consumer will make choices that are not in their best interests. This could be because they are not thinking clearly, or because they are being influenced by emotions.
Option C, emotional, means that the consumer will make choices based on their emotions, rather than on rational thought. This could be because they are feeling happy, sad, angry, or scared.
Option D, indifferent, means that the consumer does not care about the costs and benefits of different options. They will make choices randomly, or they will not make any choices at all.