I think it is D because It makes sense
Which treaty? At least provide full sentences so we can answer
Prop the Kings and Queens
Competing conquistadors arrived and fighting broke out which killed half the Spanish in 1519. Then later in 1521 European diseases killed most of the Natives which allowed Cortes to lead a brutal attack and succeed.
There are several reasons why the working class went to vaudeville shows, but perhaps the greatest reason was that it game them a rest from their ordinary lives.