Mexican War. The Mexican War brought Manifest Destiny almost to a close, Gadsden Purchase would finish it. With all the land though, it also brought the question of slavery back into question. An uneasy balance had been found prior, but the new open land meant that slavery had a place to expand into. The issue had never been completely handled. It was poorly bandaged up and passed along. The legislature would have to grapple once again with the issue. This time though it would lead directly to Civil War.
I think the correct answer from the choices listed above is the third option. The key belief or practice in the aztec religion would be noblemen sacrificed their first-born sons at the temple. Hope this answers the question. Have a nice day. Feel free to ask more questions.
