What Is the End for a Typical Quasar

What is the end for a typical quasar?

A) The black hole at the center of the quasar pulls in more and more mass from the host galaxy until everything has fallen into the black hole and nothing visible remains.
B) The tremendous inrush of matter at the Eddington limit produces a supernova explosion, leaving a galaxy with a halo of supernova remnants.
C) The black hole eventually consumes all nearby fuel and becomes a dormant black hole, called a dead quasar, at the center of the still-functioning galaxy.
D) Quasars are long lived, and we have no evidence on which to base a picture of how they end.

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