Galaxy P and Galaxy Q exist in an expanding universe. A Type II supernova goes off in Galaxy P when the two galaxies are 10 billion lightyears apart. How much time will it take for the light from the supernova to reach observers in Galaxy Q a.exactly 10 billion years b.more than 10 billion years c.more than 10 billion lightyears d.nearly instantly e.less than 10 billion years

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