Answer:
Mainly the Soviet Union backed the Viet Minh otherwise known as the North Vietnamese as the USSR backed many communist/socialist countries around the world in small proxy wars against the United States to try and gain influence and expand communism. So your answer would be the Union of Soviet Socialist Republics.
Answer:
Karl Marx is best know as being a(n) author and philosopher - last choice
Iran and Saudi Arabia have large Oil refining and Oil Shipping. So, it would be D) a and b.
