Use the Following to Answer Questions

Multiple Choice

Use the following to answer questions:
Figure: Dishwashing Detergent
-(Figure: Dishwashing Detergent) Refer to the figure. Dishwashing detergent contains phosphates that harm marine life. According to this figure, which statement is TRUE?

A) The maximum willingness to pay for the 6^th unit equals the private cost.
B) The social cost of the 9^th unit is $9 while the value to consumers is $9, eliminating the gains from trade.
C) The maximum willingness to pay for the 12^th unit equals $18, or the private cost plus the social cost.
D) The social cost of the 9^th unit is $15 while the value to consumers is $9, creating a deadweight loss equal to $6.