Answer: Indigenous people began to convert to catholicism.
Explanation: The Spanish conquerors arrived in Mexico in 1519, and incorporated the country in the "New Spain".
In these times Mexico was a mix of cultures, and one thing that is useful to remember is that the conquerors were Catholics, and in these times imposing religion was a common thing, so they imposed it on the locals.
So the correct answer here would be "Indigenous people began to convert to Catholicism."
