If a, b are integers and |a-b|=10, which of the following is the smallest possible value of ab?  Choose the correct choice from the following:  A) -16  B) 0  C) -25  D) 7  E) 40
a=5, b=-5. Hence, the answer is -25.
<result>C</result>
If a, b are integers and |a-b|=10, which of the following is the smallest possible value of ab?