The correct answer is: D. none of the above
A gauntlet-letted track is a type of track that is used in some amusement park rides. It is a continuous track that is made up of a series of small, interlocking pieces. The track is designed to allow the ride to go through a series of twists and turns without derailing.
There are no switches provided on a gauntlet-letted track. This is because the track is designed to be a continuous loop. The ride starts at one end of the track and goes around the loop until it reaches the starting point again.
The other options are incorrect because they all suggest that there are switches provided on a gauntlet-letted track. This is not the case.