What Have Both Classic and More Recent Studies of Hospital

What have both classic and more recent studies of hospital experiences found?

A) The hospital experience is often dehumanizing, and the power of the institutions to define diagnoses is heavily skewed.
B) The hospital experience is usually highly satisfactory to patients and doctors alike.
C) Mixed results have been found, as studies are of varying ages.
D) Mixed findings were revealed, as different studies used different research methods.
E) There was no concurrence between studies, and more research is needed.