According to the theory that active galactic nuclei are powered by supermassive black holes, the energy released as light comes from ________.
A) gravitational potential energy released by matter that is falling toward the black hole
B) nuclear fusion in the accretion disk surrounding the black hole
C) matter-antimatter annihilation occurring just outside the event horizon of the black hole
D) jets emerging from the accretion disk
Correct Answer:
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