Question ID:PT90 S2 Q18 Passage:Records reveal that of physical therapy patients who received less than six weeks of treatment, about 31 percent showed major improvement, regardless of whether they were treated by a general practitioner or by a specialist. Of patients who received physical therapy for a longer time, again regardless of whether they were treated by a general practitioner or by a specialist, about 50 percent showed major improvement. Therefore, the choice between seeing a specialist or a general practitioner for necessary physical therapy will not affect one's chances of major improvement. Stem:The reasoning in the argument is most vulnerable to criticism on the grounds that the argument Correct Answer Choice:EChoice A:presumes, without providing justification, that effectiveness of different practitioners in bringing about major improvement cannot differ at all if their effectiveness in bringing about any improvement does not differ Choice B:provides no information about the kinds of injuries that require short-term as opposed to long-term treatment Choice C:overlooks the possibility that patients are more strongly biased to report favorably on one of the two types of medical professionals than on the other Choice D:fails to indicate whether the number of patients surveyed who saw a general practitioner was equal to the number who saw a specialist Choice E:overlooks the possibility that specialists and general practitioners each tend to excel at treating a different type of injury