Douglas Spent a Long Time in School to Get a Law

Douglas spent a long time in school to get a law degree because he felt that being a lawyer would keep him happy and satisfied for the rest of his life. When he graduated and landed his first job at a firm, Douglas was extremely excited and felt fulfilled. A few years later, however, Douglas found that he was no longer excited about his job and considered going back to school for a business degree. Dylan's initial thought that he'd be happy forever after achieving success in law is an example of:

A) the affect heuristic.
B) functional fixedness.
C) the durability bias.
D) confirmation bias.