The Efficient Level of Paper Production Will Occur Where the

The efficient level of paper production will occur where the

A) marginal private benefit from consuming paper is equal to the marginal social cost of production.
B) marginal social benefit from consuming paper is equal to the marginal social cost of production.
C) the economically efficient level of the output of paper is equal to the economically efficient level of inputs.
D) production of paper no longer produces negative externalities.