What Major Change Took Place During the Late Nineteenth Century

What major change took place during the late nineteenth century in the teaching of medicine, architecture, engineering, and law?

A) College faculties were purged of anyone who was not a native-born American.
B) Colleges refused to train these professionals because the American public had demonstrated strong prejudice against them.
C) Standards were raised and practice was professionalized.
D) State boards of education agreed that training for such professions would best be accomplished at European universities.
E) Admissions standards dropped as the professions tried to compete with the higher-paying business world.