John was always a mild-mannered man. suddenly his behavior changed radically. he instigated fights and was verbally abusive to the people around him. it is likely that john's problem began in his:

Aggressive passive personality disorder.

Explanation: Is characterized by a particularly passive attitude when it comes to the essential obligations that anyone has to assume in life. It derives from the inability to express anger in a healthy way. The feelings of the person suffering from it can be repressed to the point that no one around them realizes that they are angry or resentful.

the answer is d.index