Assuming Government's Goal Is to Benefit Society as Much as Possible

Assuming government's goal is to benefit society as much as possible:

A) actions with negative and positive externalities should be encouraged.
B) actions with negative and positive externalities should be restricted.
C) actions with negative externalities should be encouraged and actions with positive externalities should be restricted.
D) actions with negative externalities should be restricted and actions with positive externalities should be encouraged.