The Unified Model of AGN Suggests That Quasars, Seyfert Galaxies

Multiple Choice

The unified model of AGN suggests that quasars, Seyfert galaxies, and radio galaxies are

A) unrelated, although they are all very luminous galaxies at radio wavelengths.
B) powered by differring mass accretion rates onto supermassive black holes.
C) driven by violent mergers of two gas-rich spiral galaxies.
D) similar phenomena but viewed from different orientation angles.
E) all powered by high rates of star formation and supernova explosions.