An Economist Might Say That the United States Doesn't Have

An economist might say that the United States doesn't have enough oil spills in its rivers if it were determined that:

A) fewer than 1 million fish were being killed by oil spills each year.
B) the marginal benefits of more oil pollution in the river outweighed the marginal cost of preventing or cleaning up the oil spill pollution.
C) the marginal benefits of less oil pollution in the river were less than the marginal cost of reducing the amount of oil spilled at that level.
D) both B and C would lead an economist to that conclusion.