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The center of our galaxy contains a very intense source of radio and X-ray radiation named Sgr A*. What is it about this source that supports the idea that the radiation comes from a black hole?a.​Only radiation from a black hole could penetrate the giant molecular clouds between Sgr A* and Earth.b.​The radiation is strongly redshifted indicating that the object is growing.c.​The radiation is coming from an incredibly small object.d.​The radiation is strongly blueshifted, indicating that the object is collapsing.e.​Radio waves can only be produced by matter orbiting a black hole.

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