If r and s are even integers, which of the following is an odd integer?  Choose the correct choice from the following answers:
A) rs + 2  B) r(s − 1)  C) r(r + 5)  D) 3r + 4s  E) (r + 3)(s − 1)
If r and s are even integers, then:   A. rs + 2: even + even = even   B. r(s − 1): even(odd) = even   C. r(r + 5): even(odd) = even   D. 3r + 4s: even + even = even   E. (r + 3)(s − 1): (odd)(odd) = odd.   Answer is (r + 3)(s − 1).
<result>E</result>
If r and s are even integers, which of the following is an odd integer?