The answer to which of the following questions would be most useful in evaluating Gary's argument? A. What proportion of the town's drivers involved in accidents that occurred prior to the modification suffered personal injury in their accidents? B. How long, on average, had the members of the traffic commission held their offices when the modification was implemented? C. Do a majority of the town's residents approve of the traffic commission's overall performance? D. What measures have nearby towns taken within the last three years in order to improve visibility at dangerous intersections? E. How has the volume of traffic at the town's busiest intersection changed over the last three years?