Of the Following Statements, Which One Is Least Accurate as It

Of the following statements, which one is least accurate as it pertains to the professionalization of health care in the United States?

A) Prior to 1800, virtually anyone could be a physician by simply proclaiming themselves as one.
B) There were more medical schools in the United States in the 1800s than in the early 1900s.
C) Prior to 1900, medical training was brief and did not even require a high school diploma.
D) When medicine became a profession, it immediately increased the availability of health care by licensing more doctors.