If 1/a + 3/a + 3/a is an integer, which of the following must also be an integer?	Choose the correct choice from the following.
A) 12/a  B) 3/a  C) 7/a  D) 9/a  E) 15/a
1/a + 3/a + 3/a   =7/a   Answer 7/a
<result>C</result>
If 1/a + 3/a + 3/a is an integer, which of the following must also be an integer?