Market Failures:
A. The free-rider problem is most likely to exist in a market in which goods are excludable and rival.
B. The free-rider problem is most likely to exist in a market in which goods are excludable and nonrival.
C. The free-rider problem is most likely to exist in a market in which goods are nonexcludable and rival.
D. The free-rider problem is most likely to exist in a market in which goods are nonexcludable and nonrival.