Question ID:PT86 S4 Q4 Passage:Warner: Until recently, most competitive swimmers were high school or university students. Now, more and more competitive swimmers are continuing well beyond their university years. Clearly, better training regimens have allowed today's competitive swimmers to stay fitter longer than swimmers of the past.Young: Not necessarily. No one has the time to both be a competitive swimmer and hold an outside job. But unlike in the past, today's competitive swimmers can make a living at their sport. Stem:Young responds to Warner's argument by Correct Answer Choice:EChoice A:attempting to demonstrate that the evidence Warner advances actually undermines Warner's conclusion Choice B:presenting a counterexample in order to weaken the evidence offered in support of Warner's conclusion Choice C:arguing that a condition that Warner takes to be sufficient to account for a phenomenon is necessary but not sufficient Choice D:maintaining that the evidence presented in support of Warner's conclusion presupposes the truth of that conclusion Choice E:offering an alternative to Warner's explanation of a certain phenomenon