Eva: A "smart highway" system should be installed, one that would monitor areawide traffic patterns and communicate with computers in vehicles or with programmable highway signs to give drivers information about traffic congestion and alternate routes. Such a system, we can infer, would result in improved traffic flow in and around cities that would do more than improve drivers' tempers; it would decrease the considerable loss of money and productivity that now results from traffic congestion. Louis: There are already traffic reports on the radio. Why would a "smart highway" system be any better? If Eva responded to Luis by saying that the current one-minute radio reports are too short to give a sufficient description of overall patterns of traffic congestion, which one of the following, if true, would most strengthen Luis's challenge? ['It would be less costly to have radio stations that give continual, lengthier traffic reports than to install a "smart highway" system.', 'Bad weather, which radio stations report, would cause traffic to slow down whether or not a "smart highway" system was in operation.', 'The proposed traffic monitoring would not reduce the privacy of drivers.', 'Radio reports can take note of congestion once it occurs, but a "smart highway" system could anticipate and forestall it in many instances.']