Pulsars are stars that give off preciselly spaced bursts of radiation. Which of the following is responsible for this phenomenon.
AThe strong magnetic field of a neutron star causes it to emit radiation into narrow beams that sweep by earth as the star spins.
BThe presence of a neutron star orbiting very close to the pulsar causes a recurring increase in the pulsar's energy output
CThe buildup and collapse of neutron star's magnetic field repels and attracts ionised gases on the stars surface
Dsize and distance