please answer

This graph shows the marginal cost and marginal benefit associated with roadside litter cleanup, Assume that the marginal benefit curve and marginal cost curve each have their usual slope. 30 25 20 15 10 10 15 20 25 30 Bags of Litter Removed Per Day Picking up the 20th bag of litter would Multiple Choice X be socially efficient O increase total economic surplus. O create deadweight loss. O be socially efficient but would not be consistent with the actions of self-interested individuals