The definite cause of depression still remains unknown, which is in -考呗网题库移动版

单选题
The definite cause of depression still remains unknown, which is in part why scientists are still working on it.

参考答案H

解析:

单选题
Classifying depression into subtypes has already been in disfavor and replaced by many more new definitions.

单选题
The definition of depression in the Diagnostic and Statistical Manual went through several editions over the past six decades.

单选题
Far from being the psychiatrists' authoritative masterpiece, DSM is considered as a lexicon at best．