If 72/x is an integer and 108/x is an integer, which of the following must be true?
I. 9/x is an integer.
II. 12/x is an integer.
III. 36/x is an integer.
Options:
A) III only B) I and II only C) I, II, and III D) II and III only E) I only
The largest possible value of x is 36 (the greatest common factor of 72 and 108), and if x=36 then   III only
<result>A</result>
If 72/x is an integer and 108/x is an integer, which of the following must be true?
I. 9/x is an integer.
II. 12/x is an integer.
III. 36/x is an integer.