I think the answer would be c but I’m not sure
Answer:
The interviews were conducted in 1937 and this is years after the emancipation of slavery so these people interviewed are very old and may not remember everything. It could make it more reliable because it gave the interviewee time to reflect on everything that happened to them. ... The interviewer in Document C was black.
Explanation:
He believed that they were soldiers of democracy because they fought in a war to protect a world that disenfranchised them and segregated them and ended the reconstruction and what not. He believed that the country was being heavily racist towards African-Americans and yet the soldiers still put their values above this and fought to protect a democracy that didn't protect them.