If a and b are odd integers, which of the following is an even integer? Choose the correct choice from the following choices: A) 2(a-b)+ab B) 2(a-b)+a C) 2(a-b)+b D) 2(a-b)+ab+a E) 2(a-b)+4a+b
2(a-b)+ab+a=even+odd+odd=even   The answer is 2(a-b)+ab+a.
<result>D</result>
If a and b are odd integers, which of the following is an even integer?