Consider the Following Methods of Pollution Reduction

Multiple Choice

Consider the following methods of pollution reduction:
A.the government sets a target for maximum emissions
B.the government mandates the installation of specific pollution abatement equipment
C.the government imposes a per unit tax on the good that creates pollution
D.the government gives firms a tax rebate for every unit of pollution abated
Which of the above is an example of a command-and-control approach to reducing pollution?

A) a only
B) b only
C) a and b only
D) a, b, and d only
E) a, b, c, and d