In 1932, America suffered greatly during the Great Depression. The President at the time, Herbert Hoover, promised many reforms and improvements that would help everyone get back onto their feet. Those promises were broken as Hoover did little to pull America out of the Depression. As a result, Hoover wasn't really well liked, during and after the depression. When the elections of 1932 came around, Hoover decided to run again, but Americans went and voted for Roosevelt, who actually did something to help during the depression.
Answer:
Christianity had spread throughout Europe and Asia
The correct answer in my opinion would be that D is the most important factor here. But this question is quite tricky.
We can surely say for example that literature, organized schools and a hierarchy of priests are not something that constitute a civilization. Organized schools appeared to late, not every civilization had literature and having only a hierachy of priests is not enough to say you have a civilizaton.
Labor has been divided in pre-civilization hunter-gatherer societies as well.
For that reason I'd say the correct answer is D - more food than is needed for survival. Having this, the people in a certain group can focus on other things.