How did the inca rule over their conquered peoples in south america?

Captured Children where sent to learn the Incan ways. Women where used to produce incan offspring, and the men where killed.

Explanation:

When the Inca people captured a town or village. They gathered all the children, which where sent to an Inca fortress to learn their language, and their ways. Women where used as slaves to cook and clean for the men, and on occasion, young women where taken as wives to produce Inca children. The men where killed.

answer; i do believe its (b) 12.5 years of age;