The Unified Model Describes Active Galactic Nuclei Using

Multiple Choice

The unified model describes active galactic nuclei using

A) a supermassive black hole at the center of a normal spiral galaxy.
B) a supermassive black hole surrounded by an accretion disk and dense disk of gas.
C) an accretion disk around a neutron star.
D) gravitational lenses to intensify the radiation coming from them.
E) different lines of sight toward and dwarf irregular galaxy.