The writer claims that his theory is ______.

A．he is greedy and he has a violent hunger for wealth
B．he is cruel and is not above robbing his fellowmen of their possessions
C．he assumes that he is superior to other animals in spite of his past record
D．he is an unreasoning creature

A．to prove that man is a descendent from some higher animal
B．to satirize human greediness
C．to prove that man is superior to other animals
D．to criticize man as a maniac