SAT: Question of the DAY!!!

March 1, 2013 Number Properties

If p and n are integers such that p > n > 0 and p^2 –  n^2  = 12, which of the following can be the value of p – n?
I. 1
II. 2
III. 4
(A) I only
(B) II only
(C) I and II only
(D) II and III only
(E) I, II, and III

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