Consider the following situations. Which ones appear to represent rational decision making? Explain.

(a) Joe's best friend has decided to become a civil engineer, so Joe has decided that he, too, will become a civil engineer.

(b) Jill needs to get to the university from her home. She bought a car and now drives to the university each day. When Jim asks her why she didn't buy a bicycle instead, she replies, "Gee, I never thought of that."

(c) Don needed a wrench to replace the spark plugs in his car. He went to the local automobile supply store and bought the cheapest one they had. It broke before he had finished replacing all the spark plugs in his car.