Which of the Following Statements Is True Regarding the Efficiency

Which of the following statements is true regarding the efficiency of using pollution fees versus quantity standards to regulate pollution?

A) Quantity standards are more efficient fees because they can be used even in the presence of incomplete information.
B) Pollution fees are more efficient because they ensure that all firms pay a uniform penalty for continuing to pollute.
C) Quantity standards are more efficient because they allow for more flexibility and adjustment.
D) Pollution fees are more efficient provided the fee is less than the marginal externality cost.
E) Pollution fees are more efficient because they induce greater total pollution reduction.