The following data show the relationship between the number of drivers who leave for work at 8 a.m., their average commute time, and their marginal benefit of commuting.Number of DriversWho Leave at 8 a.m.AverageCommute TimeMarginalBenefit10030 minutes$1020065 minutes$8300110 minutes$4400170 minutes$3500260 minutes$1 If there is no charge to use the highway, then one would expect that ________ than the socially optimal number of drivers will leave at 8 a.m. because ________.
A. less; each driver's use of the highway imposes an external cost on other drivers by increasing the commute time
B. more; each driver's use of the highway imposes an external cost on other drivers by increasing the commute time
C. more; the social marginal benefit of using the highway is greater than the private marginal benefit
D. less; the private marginal benefit of using the highway is greater than the social marginal benefit
Answer: B
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