-Refer to the Diagram Above,which Shows the True Marginal Cost

Multiple Choice

-Refer to the diagram above,which shows the true marginal cost and marginal benefit of air quality.A leftward shift of the marginal benefit curve of air quality would

A) reduce the optimal level of pollution.
B) raise the optimal level of pollution.
C) not affect the optimal level of pollution.
D) reduce the cost of manufacturing products.
E) increase the cost of manufacturing products.