-The Above Figure Shows the Marginal Social Benefit and Marginal

-The above figure shows the marginal social benefit and marginal social cost curves of chocolate in the nation of Kaffenia. There is no external benefit nor external cost. The demand curve for chocolate is the same as the

A) marginal social cost curve of chocolate.
B) marginal social benefit curve of chocolate.
C) opportunity cost curve of chocolate.
D) marginal social benefit curve minus the marginal social cost curve of chocolate.