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.

answer; i believe the correct answer is (4) flip a coin as each participant arrives,heads indicates assignment to the first group: tails indicates assignment to the second group;

it's the under parts of the car