Question #9 Which of the following statements characterizes the time costs associated with transit ridership under Mohring economies? If ridership is sufciently low, the competitive market produces socially optimal levels of urban transit ridership. At small transit volumes, the marginal social time costs of urban transit are larger than the average (or private) time costs of urban transit. By increasing the frequency of bus or rail service, the transit authority can reduce time costs for everyone riding the system. None of the above. (A) and (B) (A) and (C) (B) and (e)