Which of the Following Is True

Which of the following is true?

A) Regulation is a superior method of emissions reduction because it can be controlled by the government.
B) Once the property rights are assigned, the carbon tax regime will adjust the private costs to the full social costs and the perfect market equilibrium will be achieved.
C) Once the correct property rights are assigned and the market is competitive, the emissions trading scheme will achieve the socially desirable outcome.
D) The property rights accompanied by regulation are superior policy solutions because the government knows better what is the best solution for emissions reduction.