The correct answer is C. Tape separator.
A tape separator is a visible silver rectangle which separates the take-up portion of the magnetic tape from the data recording portion. It is used to prevent the tape from being accidentally rewound onto the take-up reel before the data has been recorded.
A load marker is a small hole or notch on the edge of a magnetic tape that indicates where the tape should be loaded into a tape drive.
A tape marker is a small piece of tape that is used to mark a specific location on a magnetic tape.
None of the above options are correct.