(B) says, "It treats information acquired through informal conversations as though it provided evidence as strong as information acquired on the basis of controlled scientific studies."
Lucien is certainly relying on informal information to arrive at his conclusion, but the problem with (B) is that Lucien never makes the claim that anecdotal evidence is as strong as scientific studies. Thus, we can get rid of (B).
(C) says, "It responds to a claim in which "available" is used in the sense of "affordable" by using "available" in the sense of "not occupied.""
(C) looks great, as the advocates are talking about a shortage in vacant apartments that the homeless could actually afford, not the empty apartments (that are presumably expensive luxury residences) next to Lucien's apartment. Thus, (C) is the correct answer choice.
Does this make sense? Let us know if you have any other questions!
