If x is an integer, which of the following must also be an integer?
I. xy
II. y/x
III. y Choose the correct choice from the following answers
A) I alone	B) II alone	C) III alone	D) I and III	E) None of the above
Lets take X = 11 and Y = 2   Then XY = 22 which is an integer.   But X/Y = 11/2 --&gt; Not an integer.   Y/X = 2/11 --&gt; Not an integer.   y alone is 2. which is an integer.   Hence I and III.
<result>D</result>
If x is an integer, which of the following must also be an integer?
I. xy
II. y/x
III. y