"They thought he was crazy and might do something terrible ...", "crazy" here means（）

A．Don't judge a person only by his behavior.
B．People need understanding.
C．Conditions can change a man.
D．Anyone has his strongpoints (优点) and shortcomings.

A．with a cold and wet climate
B．with a pleasant climate
C．with a surprising climate
D．with climates of various kinds