Why was there opposition to Soviet control in Hungary in 1956 and Czechoslovakia in 1968

Which of the following was as a provision of the chinese exclusion act that affected chinese immigrants who were already in the united states ? a. the act forced chinese to return to china . b .) the act prohibited chinese immigrants from becoming american citizens. c.) the act prohibited chinese immigrants from entering the united states. d.) the act prohibited chinese immigrants from forming chinatowns