D) To fight the spread of communism.
Because of the Domino Theory they thought that if Vietnam fell into Communism, the whole region would follow. So therefore they wanted to support South Vietnam in order to contain Communism in Asia.
All of the above :)) hope this helped
<span>go to https://en.wikipedia.org/wiki/Yuan_Shikai
and it will tell you everything about him
</span>
c) spread of communism in America
Well, I am pretty sure that the correct answers will be C and D. This is because when people had traveled with Marco Polo they had seen all of the opportunity that they were missing when they weren't trading what they had traded with the Orient when they first started. The Crusades influenced a lot of people to start trading with others I personally think that they forced some people to do it but we don't know that for sure.
I hope this helps!!!!!!!!!!!!!!!!!! Please mark me as Brainiest
