Which fact is the BEST piece of supporting evidence that overproduction and falling prices was a cause of the Great Depression?

Question

Which fact is the BEST piece of supporting evidence that overproduction and falling prices was a cause of the Great Depression?

Responses
A In 1930 over 1,350 banks closed and customers lost all their savings.
B The unemployment rate in 1929 was 3.2% and by 1933 there was a 25% unemployment rate.
C In 1920 a bushel of wheat sold for $2.94, in 1929 it sold for $1.00 and by 1932 a bushel sold for .30 cents.
D The stock market's Dow average dropped over 23% over a two-day period in October of 1929 and lost 90% of its value by 1932.

Answer 1

C The fact that the price of a bushel of wheat dropped from $2.94 in 1920 to .30 cents by 1932 is the best piece of evidence that overproduction and falling prices was a cause of the Great Depression. This sharp decline in prices for a basic commodity like wheat indicates a significant oversupply in the market, leading to economic instability and contributing to the overall economic downturn.