Just did that quiz, The correct answer is T. :)
If I'm Correct,Portugese traders and sailors wanted a way to asia for the spice trades.
Main cause communism. The north did not want to adopt communism while the south did hence the reason for why the US got involved to make sure that the north would win so as to help stop the spread of communism (sorry i know this is kind of late)
The government sells treasury bonds