The Market Price for Good X Is $10

Multiple Choice

The market price for Good X is $10.75, and every time Good X is consumed it creates an external benefit of $3.00. Therefore, which of the following is correct?

A) The social benefit of Good X is $13.75, a justification for the government to give buyers a $3.00 subsidy.
B) The social benefit of Good X is $7.75, a justification for the government to give buyers a $3.00 subsidy.
C) The social benefit of Good X is $7.75, a justification for the government to tax sellers $13.75 per unit.
D) The social benefit of Good X is $13.75, a justification for the government to tax sellers $3.00 per unit.