According to Randall Collins, Why Do Members of Lucrative Professions

According to Randall Collins, why do members of lucrative professions like law and medicine support the current educational system?

A) They understand how complicated their professions are and want to make sure that everyone who enters them is well trained.
B) They want to keep the number of potential job applicants down, thereby minimizing competition and ensuring that there are a large number of people for less lucrative, less pleasant professions.
C) They know that the world is changing quickly, and they want to make sure that new doctors and lawyers are fully versed in the intricacies of twenty-first-century life.
D) They tend to invest in private schools, so they make a profit from education.