When a negative externality exists in a market, total surplus:

A.  is the same but re-distributed differently than if that same market did not have a negative externality.
B. is the same as a market without a negative externality.
C. is increased by deadweight gain compared to that same market without a negative externality.
D.   is decreased by deadweight loss compared to that same market without a negative externality.

ANSWER:

D.   is decreased by deadweight loss compared to that same market without a negative externality.