Medical Sociology, as a Subdiscipline, Began Gaining Strength

Medical sociology, as a subdiscipline, began gaining strength:

A) It was always part of sociology as a major focus of classical sociologists.
B) After World War II with the infusion of large amounts of federal funding for research.
C) Only in the last two decades when major worldwide health crises highlighted the need for it.
D) It never has been a major part of sociology and exists only as a small part of the medical field.