A)The Mexican population pushed them north, to stay further away from the capital.
Answer:
He traveled to the Americas for various reasons, one thing that Columbus did was in a way start the Columbian exchange where things such as food, plants, livestock, and diseases were spread into the Americas that were never there before.
The foreign policy issue that was a motivation for American intervention in Vietnam was the idea of "containment" which sought to contain communist expansion where it was, as opposed to attempting to eradicate it at the source.
you are both wrong the right answer is the taklamakan desert.