Why did soviet leader mikhail gorbachev push for perestroika or a change in the soviet economy

Which of the following statements best describes the spread of communism in the years immediately following world war ii? a. the number of communist countries increased during these years. b. the number of communist countries decreased during these years. c. the number of communist countries stayed the same during these years. d. the number of communist countries increased in asia but decreased in europe. ( answer in the format above for me to understand)

What did nativists think about chinatowns in the late 1800s?

Many young people traveled by train out of the midwest in search of new opportunities during the 1930s. what term is used to describe their actions