The answer to that is poor working conditions and cruel treatments of peasents.
Russa, or the U.S.S.R. at that time. When the U.S. found out about Russian missiles in Cuba, they established sanctions once the U.S.S.R. got rid of the missiles. So as soon as the Russians put missiles in Cuba, it was a domino effect that led up to the cold war.
C, Most of the important food crops in Germany had died
For question 1, Andrew Myrick said " So as far as I'm concerned, if they are hungry let them eat their own dung (dung meaning poop) or grass." That got a lot of people angered.
I'll answer the other 2 shortly.