What was the u. s. policy to stop the spread of

what was the u.s. policy to stop the spread of *communism*

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.

it foreshadows the theme of the paragraph and hints the topic that will be discussed in the paragraph!