PQ 12.07

A light house that warns ships about nearby rocks is ______ in consumption and ______ . As a result, the private market will likely provide ______ lighthouses.

Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer.

a

nonrival; nonexcludable; too few

b

nonrival; nonexcludable; too many

c

rival; excludable; the optimal amount of

d

nonrival; excludable; too few