Why did the Confederacy face food shortages as the Civil War progressed?

Why did the Confederacy face food shortages as the Civil War progressed?

A. Farmland was taken over to build weapons factories.
B. Many Southerners refused to contribute to the war effort.
C. There were not enough workers to cultivate and harvest crops.
D. A sudden rise in inflation led to a steep drop in the cost of food.