Complete subject: Everyone in the church.
Complete predicate: rushed out.
Answer:
He feels strongly about preserving and maintaining them.
Explanation:
In this excerpt, Joseph is willing to continue whith his tribe's cultural tradition: to regain their lands from the hands of the white. Joseph's father has just died without being able to regain his land in Oregon. As a consequence, Joseph feels stronger in preserving and maintainnig their resistance against the white. "<em>He left a good name on earth. He advised me well for my peopl</em>e" these words make Joseph's intentions clear: he will go on with the tribe's peaceful fight against the white.
The answer is who because is makes it makes the most sense