Why don’t competitive markets do a good job providing public goods? a. Because people do not receive

Why don’t competitive markets do a good job providing public goods? a. Because people do not receive benefits from public goods. b. Because firms cannot produce enough to satisfy market demand. c. Because public goods generate negative externalities, and pollution taxes reduce the incentive for firms to supply public goods. d. Because it is difficult to exclude people from gaining benefits from public goods without paying for them, and so market demand does not reflect the benefits to society from the public good.