Which of the Following Is Not an Example of Rational

Which of the following is not an example of rational self-interest,as defined by economists?

A) A person risking his or her life to save someone else.
B) A wealthy widow leaving a million dollars in her will to her cat.
C) A farmer turning down an offer for his land that would make him independently wealthy.
D) A collector paying $4 million for a particular painting,when other paintings by the same painter were available at a lower price.
E) An individual paying a high price for an electronic widget at a store instead of buying it at the adjacent store offering the same widget at a lower price.