A superconductor is capable of repelling a magnet so that it hovers just above the surface of the superconductor. Which statement explains why the magnet can hover above the superconductor?
a) The superconductor generates a magnetic field that repels the magnet.
b) The superconductor creates a gravitational force that lifts the magnet.
c) The magnetism of the superconductor attracts the magnet.
d) The heat generated by the superconductor creates a cushion of air for the magnet to hover.
