Question ID:PT40 S1 Q4 Passage:Anne:  Halley's Comet, now in a part of its orbit relatively far from the Sun, recently flared brightly enough to be seen by telescope.  No comet has ever been observed to flare so far from the Sun before, so such a flare must be highly unusual.Sue:  Nonsense.  Usually no one bothers to try to observe comets when they are so far from the Sun.  This flare was observed only because an observatory was tracking Halley's Comet very carefully. Stem:Sue challenges Anne's reasoning by Correct Answer Choice:DChoice A:pointing out that Anne's use of the term "observed" is excessively vague Choice B:drawing attention to an inconsistency between two of Anne's claims Choice C:presenting evidence that directly contradicts Anne's evidence Choice D:offering an alternative explanation for the evidence Anne cites Choice E:undermining some of Anne's evidence while agreeing with her conclusion