The Oregon Trail was part of the idea of Manifest Dynasty because, Manifest Dynasty was the idea that America should expand into the Western Territory. The Oregon Trail is people who are traveling from the East to the West, so it demonstrates Manifest Dynasty very strongly.
At the First Continental Congress, the delegates discussed boycotting British goods all together, but decided to send the Crown a list of their grievances in the hopes of getting the Intolerable Acts lifted.
The interpretation of Moctezuma's understanding of human sacrifices is that the gods would punish them if they're not performing enough human sacrifices. He got this understanding when he visited the aztec as an arkeolog in the past
