Who led the Bolsheviks and became the new leader of Russia?

What was the name of the theory that said that if one country in a region fell to communism, others would surely follow? 1) domino theory 2) arms race 3) brinkmanship 4) containment theory

Many single parents report complex feelings, such as frustration, failure, and guilt. this often leads them to behave in a(n) toward their children.

Which statement describes a major advantage of a unitary system of government over a confederal system