Read the following excerpt from a speech made in response to Christian missionaries in 1805:

"You say that you are right, and we are lost; how do we know this to be true? We understand that your religion is written in a book; if it was intended for us as well as you, why has not the Great Spirit given it to us, and not only to us, but why did he not give to our forefathers the knowledge of that book, with the means of understanding it rightly?"

Which statement best conveys how the author achieves his purpose in this excerpt?

A. He uses the words "you" and "your" to indicate that the missionaries practice a different religion.
B. He asks questions that are difficult to answer to help the missionaries understand his doubts.
C. He repeats the word "we" to show that the American Indians want to work with the missionaries.
D. He asks questions to challenge the beliefs of other Americans.