Read the following pas...

Câu hỏi: Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions

A. How the principles of use and disuse change people's concepts of themselves.

B. The way in which people change themselves to conform to fashion

C. The changes that occur according to the principle of use and disuse

D. The effects of the sun on the principle of use and disuse