This Graph Shows the Marginal Cost and Marginal Benefit Associated

Multiple Choice

This graph shows the marginal cost and marginal benefit associated with roadside litter clean up. Assume that the marginal benefit curve and marginal cost curve each have their usual slope. According to this graph, the marginal benefit of litter removal is highest when the ______ bag of litter is removed.

A) first
B) 10^th
C) 15^th
D) 30^th