I can not solve this problem . Help

A - direct example of his writing

Explanation:

A primary source is anything that is a first-hand account of what happened (i.e. original writing, photographs, etc.). Of the answers listed, A is the only one that could possibly refer to a primary source because it mentions that this is a direct sample of his writing.

Evidence, interpretation, or reposts on a website are all secondary sources. The people who wrote them weren't there when this happened.

there were 6 major base camps.   the base camps were located in alva, fort reno, fort sill, the madill provisional internment camp headquarters, mcalester and camp gruber.

the answer is c have a good day