b. a large supply of immigrant labor (Irish and German laborers from the East, and primarily Chinese from the West)
Answer:
"Why is Christianity so successful?", Well Because God Wants Us to be Successful,he wants to put us on display in front of the whole world and without him were nothing and the thing is with everything is that not everyone is saved from Jesus Christ and Its A Big Deal/Meaning of being a Christian God Gives us Grace sometimes but not all the time.
Explanation:
There were several causes that lead to the Cold War. The most important ideological conflict was that the Soviets believed in Communism and rest of the worl including United States of America disliked Communism. Soviets were against capitalism and the Americans were in favor of capitalism. The Soviets were also afraid of the nuclear bombs that United States possessed during that time and it was a grave security concern for the Soviets.