At the ________ level of provision for a ________ good, the government must know everyone's preferences.

A) optimal; private
B) unregulated; private
C) optimal; public
D) unregulated; public

Optimal Level

The most efficient, beneficial, or favorable point in a process or activity, often associated with achieving the best outcome or maximum productivity.

Public Good

A good that is non-excludable and non-rivalrous, where one person's enjoyment of the good does not diminish the ability of others to enjoy it, typically provided by the government.