Mayor: the commuters from the nearby suburb of Coldstream perennially complain of a difficult commute to our downtown region. To address these concerns, we should install high-speed toll collector on the interstate between here and Coldstream, thus relieving any traffic snarls caused by the hand-operated toll booths. Civil engineer: Over 95% of commuters from Coldstream take local roads, not the interstate, to our downtown region. The civil engineer uses which of the following techniques in responding to the mayor?
【选项】citing evidence that calls into question the assumption of the argument