Recent Spectral Observations of the Faint Light from the Regions

Recent spectral observations of the faint light from the regions surrounding several quasars seem to indicate that quasars may be

A) rapidly rotating neutron stars within the remnants of a supernova explosion.
B) the super-luminous centers of active galaxies.
C) very luminous stars surrounded by extensive planetary systems.
D) very active nearby stars with extensive atmospheres,which are moving rapidly for some reason.