I believe that the answer is B
They should live following the eightfold path. Otherwise known as the middle way.
It can. The mexican-american war also dealt with the future of the territories that were involved like the Texas territory. Since the United States won the territories from Mexico, the new colonies wanted to be slave colonies, and the general government disliked this. There would've been fewer slave colonies if they hadn't been conquered.
Pretty sure 1) is A and 2) is D. But I could be wrong! Hope this helps!