The main reason why the twenties are sometimes called an "age of prosperity", especially in the United States, is that "<span>A.Incomes throughout the United States grew and the middle class held most of the wealth," due mostly to speculation in the stock market. </span>
B. The Wright brothers . . .

Answer:
answer is (c) hope it will help you ❤️
The Caste System in India was used to provide social control and conformity according to ones birth
C.