3. What led the Soviet Union to join with Great Britain and the United States to become allies during much of World War II?
a) German military forces invaded the Soviet Union in 1941.
b) Communist thinkers changed their theories of capitalism during the 1940s.
c) The people of the Soviet Union elected a new leader who had more trust for Great
Britain and the United States.
d) The Soviet Union wanted to gain more business for its companies and could sell
lots of its products to Great Britain and the United States.