The city of Littleville wishes to institute a congestion charge, in which cars driving through the most crowded streets of Littleville, in the downtown area, would pay a fee when they did so. Proponents argue that, in these circumstances, most of the drivers in the city would choose to use outlying roads. This reduction in the traffic in downtown Littleville would help reduce the number of car accidents in the area.

The conclusion drawn in the above argument depends on which of the following assumptions?

A. The outlying roads in Littleville would not present a prohibitive inconvenience for most of the drivers in Littleville who normally use the downtown roads

B. Most of Littleville's outlying roads are equipped only to handle cars and not the kind of commercial trucks that often have to make downtown roads

C. Drivers in Littleville who can afford the congestion charge are less likely to be involved in a car accident than those who cannot

D. Cars driving through downtown Littleville are at greater risk of being involved in a car accident than those that use outlying roads

E. Implementing a congestion charge in Littleville would eventually create such traffic on the outlying roads that the number of car accidents would increase

The OA is D