W and B are integers. The expression (W+1)(B+1) is even. What can be said about W and B?	Choose the correct choice from the following choices.
A) They are both even numbers.  B) At least one of them is even.  C) At least one of them is odd.  D) They are both odd.  E) Nothing can be said surly on W and B
Odd x Odd = Odd   Odd x Even = Even   Even x Even = Even   To fulfill condition Either (W+1) or (B+1) needs to be Even   So either W or B needs to be odd   Or At least one of them is odd.   At least one of them is odd=At least one of them is odd.
<result>C</result>
W and B are integers. The expression (W+1)(B+1) is even. What can be said about W and B?