The correct answer is C.
First we must prepare the names for alphabetic filing (that is, the last name is considered before the first name)
Helms Ryan, Helsley Ron, Helm Rebecca, Helms Ray.
Then we arrange by alphabetic order
Helm Rebecca, Helms Ray, Helms Ryan, Helsley Ron.
Now we can see the names as they should be filed
Rebecca Helm, Ray Helms, Ryan Helms, Ron Helsley.