The choices for this question are:
a) a picture depicting malnourished Jews at the Buchenwald Concentration Camp in Germany
b) a non-fictional story written in the 1950s about a soldier that served in World War II
c) a World War II Navy captain's diary describing explicit details about the Battle of Midway
d) a recording of President Roosevelt's speech asking Congress to declare war on Germany
The correct answer is B, a non-fictional story written in the 1950s about a soldier that served in World War II.
A primary source is a historical document (audio, video, picture, text etc.) produced in the exact context of the event we're studying and by someone that was present during the event and/or took part in it.
That's why something that was written after World War II and not by someone who was an active part on it can't be considered a primary source.
