Which of the Following Was One of the Primary Focuses

Which of the following was one of the primary focuses of the Great League of Peace?

A) It led an educational program intended to spread knowledge of the best farming techniques.
B) It successfully outlawed any wars among tribes over goods or sentiments such as revenge.
C) It greatly decreased the amount of centralized authority that had been the norm before the fifteenth century.
D) It forbid all participating Native American groups from having their own political systems and religious beliefs.
E) It relied on representatives from different groups to decide on whether to have friendly relations with outsiders.