This event during the Counter Reformation, put people on trial and would punish, torture, and even kill those who went again the teachings of the Catholic Church.

The Inquisition, in historical ecclesiastical terminology also referred to as the "Holy Inquisition", was a group of institutions within the Catholic Church whose aim was to combat heresy. Torture and violence were used by the Inquisition for eliciting confessions ... In 1965 it became the Congregation for the Doctrine of the Faith.

Explanation:

the answer is b: the religion they practice.

here's why:

there were many different native american tribes and those with similar characteristics formed a main tribe or nation. each had its own language, religion and customs.