Answer: A :)
Explanation: Not sure I just guessed ,
Rail - a bar or series of bars, typically fixed on upright supports, serving as part of a fence or barrier or used to hang things on
road - a wide way leading from one place to another, especially one with a specially prepared surface which vehicles can use.
Combine useful and relevant info
When Katy plays a baseball she has to run to a base to try to make a full home run on 4 bases