PLEASE HELP!!!!

What contributed the most toward Hernán Cortés's first victory against the Aztecs?


Cortés had learned the local languages.


The Aztecs were weakened by a smallpox epidemic.


Tenochtitlán was not equipped to keep out invaders.


A native tribe allied with the Spaniards to defeat the Aztecs.

Verified Answer :

Ok i may be wrong but from what ive been told and heard the Spaniards had allies that hated the Aztecs but also the smallpox also played a role in it.

Answer is "D"....... A native tribe allied with the Spaniards to defeat the Aztecs.