Answer the Next Four Questions Based Upon the Following Diagram

Answer the next four questions based upon the following diagram.

-If a community uses benefit-cost analysis in order to achieve the optimal reduction of waste emissions:

A) it should select a point such as H where marginal social benefits exceed marginal social costs
B) it should select any level where net benefits are positive
C) it should extend emission reduction to where marginal benefits are zero
D) it should equate marginal benefits with marginal cost and select level OD of emission reduction