75.From the passage, we can conclude
(A)not all the subjects have to do with philosophy 　
(B)a person will get a Ph. D if he/she studies philosophy 　
(C)philosophy can be helpful for the study of any other subjects 　
(D)philosophy is the only solution to all the probleras in the world

推理判断题。从文中第三段内容，可推断C选项正确。