Functions of fitting and fastenings in Railway track are?

A) to hold the track in proper position and provide a correct gauge with the help of fitting and fastenings and transfer train load to the ballast below B) to holds the Sleepers in position and provide a uniform level surface, also provide drainage to the track and transfer the train load to a larger area C) it is the component of track on which train moves and transmit the wheel loads of trains to the sleepers below D) to provide a grip between rail and sleepers