The 1930's Dust Bowl in the Western United States Is

Multiple Choice

The 1930's Dust Bowl in the western United States is an example of:

A) prolonged drought and accelerated wind erosion caused by use of marginal land for agriculture.
B) the use of flood plains for agriculture leading to desertification.
C) the natural cycle of climate disasters in that region.
D) the relationship between economics and annual precipitation.
E) human activities not being the cause of or accentuating soil problems.