10. (B)
Question type: Identify a Flaw
The writer of the letter cannot say that eliminating overcrowding and alleviating pedestrian congestion is not a goal of the council simply because he/she doesn’t think the plan will work. Answer choice (B) addresses this flaw, and is therefore correct.
(A) is outside the scope of the argument. Primary and secondary goals are not discussed.
(C) is outside the scope of the argument. The source of information is not discussed.
(D) is outside the scope of the argument, because the author is not discussing other benefits.
(E) is outside the scope of the argument. There is no conditional logic issue here.