The author of the passage is concerned that _________.

The author of the passage is concerned about feelings of isolation among women medical students.

The passage states that "feelings of isolation among women medical students persist" and that "women students still have to contend with the social stereotype of a male doctor." The passage also discusses how the lack of female faculty role models and the pervasive sexual humor of male doctors and students can contribute to women students feeling isolated.

The other options are not supported by the passage. The passage does not state that medical schools practice widespread discrimination on the basis of sex, that social norms must change before institutional bias can decline, or that some medical school policies are deliberately designed to make women students feel isolated.