All other things being equal, car insurance for the repair of collisio

All other things being equal, car insurance for the repair of collision damage costs more in Richmond than in Layton. Interestingly, drivers in Richmond are statistically less likely to be involved in an accident while driving than are drivers in Layton. Clearly, insurance companies have a larger profit margin on policies covering cars in Richmond when compared with those covering cars in Layton.

Which of the following, if true, most strengthens the above argument?

A. The average cost of repairing collision damage costs about the same in Richmond as it does in Layton.
B. Layton and Richmond have roughly equivalent populations.
C. Drivers in Richmond who have been involved in an accident are less likely to notify the police than are drivers in Layton.
D. Collision damage insurance costs more in Layton than every other neighboring municipality, excepting Richmond.
E. Consumer watch groups have long suspected that insurance companies are charging inflated premiums for coverage of vehicles in Richmond.