Consider the benefits and costs associated with the maintenance on U.S. transportationinfrastructure, a public good. The efficient amount of maintenance on the infrastructure is determined by the intersection of the____ curves.

A.

marginal benefit and marginal cost

B.

marginal social cost and marginal social benefit

C.

marginal external benefit and marginal external cost

D.

marginal social cost and marginal cost

E.

marginal private benefit and marginal private cost