Hernando cortés’s conquest of the aztecs in 1518 was made possible largely due to

Hernando Cortes was able to perform the conquest of the Aztecs mainly because of the support (tactical and military) from some of tribes that were under the rule of the Aztecs. Because multiple tribes were not happy by being under the rule of the Aztecs and even less pleased by how were they treated by them, they saw a chance to liberate themselves when the Spanish arrived, so they helped them in the conquest. Unfortunately for the local tribes, it turned out that they did not gained liberation, but instead were just under the rule of another force once the Aztec Empire fell and the Spanish one took over.

must repent and believe in god.

or the book

journey across time - chapter 10 "the rise of christianity"

c, because the american revolution was from 1765 to 1783.