The answer is: c.enrolling native children in boarding schools
Assimilation refers to the process of absorbing a dominant culture and integrate it with minority's culture. Enrolling native children in boarding schools would increase the socialization that they do with White Children so they can observe each other's culture and adapt.
From what I know, the Mongols we're known for not making huge changes in the lives of their subjects. This is what allowed the Mongolian empire to grow so large. I hope this helps
