This Graph Shows the Marginal Costs and Marginal Benefits Associated

Multiple Choice

This graph shows the marginal costs and marginal benefits associated with roadside litter clean up.Assume that the marginal cost and marginal benefit curves slope in the usual directions.
Refer to the information given above.The marginal cost of removing litter _______ due to the principle of ____________.

A) decreases;gains from specialization
B) increases;the Coase Theorem
C) increases;low-hanging fruit
D) decreases;diminishing returns to inputs