MCQOPTIONS
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| 1. |
A light year is |
| A. | The time it takes light to travel one year |
| B. | The distance the Earth moves in one year |
| C. | The distance travelled by light in one year |
| D. | The time it takes light to go once around the Earth's orbit |
| Answer» D. The time it takes light to go once around the Earth's orbit | |