If 4/a + 5/a + 6/a is an integer, which of the following must also be an integer?  Options:
A) 12/a  B) 3/a  C) 6/a  D) 9/a  E) 15/a
4/a + 5/a + 6/a   =15/a   Answer 15/a
<result>E</result>
If 4/a + 5/a + 6/a is an integer, which of the following must also be an integer?