Correct Answer:
Option B - Light year is a unit that used to measure distance. A light-year is the distance that light travels in vacuum in one year (365.25 days). The distance that light travels in one year is about 9.4607 × 10¹²kilometers.
B. Light year is a unit that used to measure distance. A light-year is the distance that light travels in vacuum in one year (365.25 days). The distance that light travels in one year is about 9.4607 × 10¹²kilometers.