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A light-year is a unit of a. time. c. mass. b. distance. d. density.
A light-year is a unit of: DISTANCE.
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Asked 4/30/2015 7:47:15 PM
Updated 5/1/2015 6:54:00 AM
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Confirmed by yumdrea [5/1/2015 6:54:00 AM]
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