A light-year is a type of unit that measures the distance among different physical objects such as for example stars (Option B is correct).
What is a light-year?
A light-year is a unit of distance that measures the separation between two or more physical objects (usually celestial bodies) when moving to the light velocity.
In conclusion, a light-year is a type of unit that measures the distance among different physical objects such as for example stars (Option B is correct).
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