The term watershed refers to the

A. direction of flow of a river from its source to the sea
B. volume of load carried by a river
C. crestlines from which two or more rivers flow in opposite directions
D. area drained by the main river and all its tributaries
E. entire area flooded by a river during the wet season

Correct Answer: Option C

C. crestlines from which two or more rivers flow in opposite directions