Answer:
some are very reasonable but most of the limitations that you get are unfair and unreasonable
Explanation:
Most of the other Countries in world war 2 ended up having terrible post-war economies. While the US and Soviet Union's economies did crash, they didn't as bad as some other countries like France and the UK's did. Another reason the Soviet Rose was because under Joseph Stalin the economy was centralized because of Communism ;D. Then the biggest reason is that they both had developed very powerful Nuclear weapons.
I am pretty sure that it would be a primary source, because the photographer captures and surrounding and the people in the photograph at a particular time.
Out of those choices it would be Prescott F. Hall.