Suppose Johnson's Rubber Factory Belches Black Smoke into the Air

Multiple Choice

Suppose Johnson's Rubber Factory belches black smoke into the air over the city of Bellowsville. If the city of Bellowsville attempts to internalize the external costs associated with the production of rubber with a pollution tax, then we expect

A) a leftward shift of Johnson's supply curve.
B) a rightward shift of Johnson's supply curve.
C) no change in Johnson's supply curve.
D) a leftward shift in the demand curve for Johnson's rubber.