M+c<n<d-m
In the inequality above, c and d are constants.
If m= 1 and n = 2 is a solution of the inequality, which of the following statements concerning c and d must be true?
I. cd is negative
II. d-c>2
III. d+ c> 2
(A) II only
(B) I and II only
(C) II and III only
(D) I, II, and III