i think it is E defensive but if im not right im sorry because im new
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.
From what I can see there are multiple correct answers. B and C are both correct. If you can only pick one I'd go with C. More recently businesses have moved more into cities.