How did the Great Depression affect the world economy?

The Great Depression had devastating effects in both rich and poor countries. Personal income, tax revenue, profits and prices dropped, while international trade fell by more than 50%. Unemployment in the U.S. rose to 23% and in some countries rose as high as 33%.

the answer is a, salt plain

according to worldatlas.com, the u.s. has an 86% literacy rate.