Which had the greatest impact on franklin roosevelt's victory in the 1932 presidential race?

The correct answer for the question that is being presented above is this one: "C. The Hoover administration had not resolved the country's economic problems."
Here are the following choices:
A. Voters wanted prohibition to continue.
B. His running mate, John Nance Garner of Texas, brought him many votes.
C. The Hoover administration had not resolved the country's economic problems.
D. Eleanor Roosevelt was able to swing the campaign in her husband's favor.