Which of the following is true regarding tradable pollution permits and Pigouvian taxes ?

A. Pigovian taxes are more likely to reduce pollution to a targeted amount than tradable pollution permits.

B. All of these answers are true

C. To set the quantity of pollution with tradable pollution permits, the regulator must know everything about the demand for pollution rights.

D. Tradable pollution permits efficiently reduce pollution only if they are initially distributed to the firms that can regulator pollution at the lowest cost.