Answer:
The Soviet Union's proclaimed goal was worldwide communism. Due to this, there had been no trust from the start between the two countries. ... The US feared further encroachment of the USSR and expansion of the "red zone".
this is no the exact answer sorry but this is why he did not trust the U.S Hope this helps!!!!
For when they took over land? well you have to know that Mexico did not want to give land to America. Eventually though, due to Mexico not having alot of people to live on said land they told Americans that they could settle there .. ONLY if they became Mexicans and they converted to Catholicism. Americans of coarse agreed...BUT......many didn't fuffil that promise . It could be said and arued that the domanent strategy for America was to settle on the land and take it over from the inside.
I'm almost certain the answer is A.