题目选项分析

In his research paper, Dr. Frosh, medical director of the Payne Whitney Clinic, distinguishes between mood swings, which may be violent without being grounded in mental disease, and genuine manic-depressive psychosis.

In his research paper, Dr. Frosh, medical director of the Payne Whitney Clinic, distinguishes mood swings, which may be violent without their being grounded in mental disease, from genuine manic-depressive psychosis.