C- Era of Asian colonization. This is due to the fact the South and Middle America was never colonialized by an Asian kingdom or country.
"He decided to keep a few of the native people captive" most likely describes why some of Pizarro’s men called him a butcher.
This phrase shows that Pizarro had a tendency to resort to inhumane practices, such as keeping prisoners without their consent, in order to reach his goals. Francisco Pizarro is also known to have committed other acts of cruelty such as executing the Incan emperor Atahualpa in 1533, as well as one of his generals.
