Why did russia sign an armistice or peace agreement with germamy in world war i before the end of the war?

a- to spread communism throughout europe?

b- to rebuild their economy?

c- to deal with the growing political revolution and spread of communism in russia?

(i think it might be a, but i'm not completely

All of the following changes typically happened in colonies as a result of imperialism, except: a. cultural practices were outlawed. b. they became more economically self-sufficient. c. european nations built modern infrastructure, including railways. d. the european language became the language of government and education.