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．it led to a terrible loss of human life
B．it was the earliest kind of flu
C．it broke out after World War One
D．it infected many animals as well