Why did the number of interest groups increase in the late 20th century

Britain and its empire stood alone against hitler and mussolini. in june 1941, hitler broke the non-aggression agreement with stalin and germany invaded the soviet union. in december, japan attacked the us and britain. the main lines of world war ii had formed.

C.east asiais the answer.

The answer is d.  the north had organized schools, whereas the south had few organized schools.