【单选题】In the competitive market for balloon rides, marginal social cost equals marginal social benefit when 3,000 balloon rides a day are taken and the price of a ride is $130. Which of the following statem...
A.
There is a free-rider problem.
B.
Too many rides are available.
C.
Too few rides are available and the price of a balloon ride is too high.
D.
The efficient quantity of balloon rides is 3,000 a day.