Problem Solving (PS) | If m and n are positive integers, and n is odd, which of the following

If m and n are positive integers, and n is odd, which of the following must be even?

(A) mn + 2n

(B) mn + 2m

(C) (n + 3)(m − 3)

(D) (n + 2)(m − 3)

(E) (n + 2)(m − 2)

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