Question ID:PT57 S2 Q15 Passage:Carla:  Professors at public universities should receive paid leaves of absence to allow them to engage in research. Research not only advances human knowledge, but also improves professors' teaching by keeping them abreast of the latest information in their fields.David:  But even if you are right about the beneficial effects of research, why should our limited resources be devoted to supporting professors taking time off from teaching? Stem:David's response to Carla is most vulnerable to criticism on the grounds that it Correct Answer Choice:AChoice A:ignores the part of Carla's remarks that could provide an answer to David's question Choice B:takes for granted that the only function of a university professor is teaching Choice C:incorrectly takes Carla's remarks as claiming that all funding for professors comes from tax money Choice D:takes for granted that providing the opportunity for research is the only function of paid leaves of absence Choice E:presumes, without providing justification, that professors do not need vacations