At a Competitive Equilibrium, If There Are No Taxes, Subsidies

Multiple Choice

At a competitive equilibrium, if there are no taxes, subsidies, price regulations, quantity regulations, or externalities,

A) both the marginal benefit and the marginal cost of the last unit produced equal zero.
B) the marginal benefit is less than the marginal cost.
C) the marginal benefit is greater than the marginal cost.
D) the marginal benefit is greater than the marginal cost by as much as possible.
E) resource use is efficient.