One of the effects of the Great Depression was

a- rising wages and prices
b- falling wages and prices
c- rapid fluctuations in business activity
d- constant growth in agricultural production

Check this site for your answer.

http://en.wikipedia.org/wiki/Great_Depression

The correct answer is b- falling wages and prices.

To get to this answer, we can start by understanding what the Great Depression was. The Great Depression was a severe economic downturn that took place in the 1930s, primarily in the United States but also affecting many other countries around the world. It was characterized by a significant decrease in economic activity, high unemployment rates, and a general decline in living standards.

During this time, one of the effects of the Great Depression was a decline in both wages and prices. As businesses were struggling and unemployment rates were high, there was a decrease in demand for goods and services. This reduction in demand led to a decrease in the prices of goods and commodities. In order to cut costs and maintain profitability, many employers also lowered wages, leading to a decrease in overall income for workers.

Therefore, the correct answer is b- falling wages and prices.