Since the mayor’s publicity campaign for Greenville’s bus service began six months ago, morning automobile traffic into the midtown area of the city has decreased seven percent. During the same period, there has been an equivalent rise in the number of persons riding buses into the midtown area. Obviously, the mayor’s publicity campaign has convinced many people to leave their cars at home and ride the bus to work.
Which of the following, if true, casts the most serious doubt on the conclusion drawn above?

Question

Examsnet · Accepted Answer

Correct Answer is :  Road reconstruction has greatly reduced the number of lanes available to commuters in major streets leading to the midtown area during the past six months.

GMAT Verbal Reasoning Practice Test 4