-The Above Figure Shows the Marginal Social Benefit and Marginal

Multiple Choice

-The above figure shows the marginal social benefit and marginal social cost curves of coffee in the nation of Kaffenia. Which of the following would result in the quantity of coffee in Kaffenia differing from the efficient quantity?

A) The existence of a single producer and seller of coffee.
B) The existence of many producers and sellers of coffee.
C) Damage to the environment from fumes emitted by coffee beans.
D) Both answers A and C are correct.