(Figure: Market 3) Use the Graph to Answer the Question

Multiple Choice

(Figure: Market 3) Use the graph to answer the question.
The graph shows the marginal social cost, demand, and supply curves in the cinnamon roll market. A corrective tax of _____ per unit will move the cinnamon roll market to the socially optimal output of _____ units.

A) $3; 12
B) $2; 12
C) $4; 8
D) $2; 8