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Part D Which of the following statements about galactic centers are true? Select all the true statements. Evidence suggests that many or most galaxies have a supermassive black hole in their centers. The mass of a galaxy’s central black hole is closely linked to the mass of a galaxy’s bulge. Supermassive black holes are interesting but unlikely to have any effect on a galaxy outside its bulge. The power source for active galactic nuclei is thought to be the accretion disk around a central black hole. The black hole in the center of the Milky Way Galaxy is one of the most massive known. Previous Answers v Correct As discussed in the video, evidence suggests that these central black holes may play an important role in galaxy evolution.