If m is an odd integer and n an even integer, which of the following is definitely odd?	Choose the correct choice:
A) (2m+n)(m-n)  B) (m+n2)+(m+n2)  C) m2+mn+n2  D) m +n  E) None
m+n because the sum of an even and an odd number is always an odd number.   Ex: 3 is an odd number and 6 is an even number. Now, 3+6=9, is an odd number.   ANSWER:m +n
<result>D</result>
If m is an odd integer and n an even integer, which of the following is definitely odd?