The expression uv+u is odd when the u and v are integers. Which of the following expressions must be even? Choose the correct option
A) u B) v C) u + v D) uv - u E) u + v^2
uv+u is odd   u and v are integers   If u were even uv+u would be even despite any value of v.   v can't be odd, so v must be even.   Ans : v
<result>B</result>
The expression uv+u is odd when the u and v are integers. Which of the following expressions must be even?