Visible Pulses Are Seen to Accompany Radio Pulses from a Neutron

Visible pulses are seen to accompany radio pulses from a neutron star only

A) from neutron stars that are high above the galactic plane, where visible light is not obscured by dust and gas.
B) if the neutron star is relatively young.
C) if the neutron star is part of a binary star system.
D) if the neutron star is relatively old, since pulsars from recent supernova explosions produce only radio pulses.