The Surprising Observational Fact About Quasars Is That They Appear

Multiple Choice

The surprising observational fact about quasars is that they appear to

A) produce the energy output of greater than 100 galaxies in a volume similar to that of the solar system.
B) be the largest known structures in the universe, although they produce only modest amounts of energy.
C) be associated with ancient supernova explosions.
D) be moving rapidly toward Earth while emitting large amounts of energy.