The Two-Stage Ditch Design Was Created in Order to

Multiple Choice

The two-stage ditch design was created in order to

A) drain wetlands and provide more agricultural land.
B) combine agricultural areas with aquaculture of fish.
C) allow ditches to drain off excess water from croplands but also avoid erosion during heavy rains.
D) bring water from distant rivers and lakes to drylands in the process of desertification.