Read the following passage and m...

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 question from 18 to 25.

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

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

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

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