"Lightyear" is a <em>distance</em> ... specifically, the distance that light travels
through vacuum in one year of 365 days.
It's equivalent to 9.454 x 10^12 kilometers, or 5.875 x 10^12 miles .
<span>D. unbalanced force, motion, and movement in the same direction of the applied force
Hope this helps!</span>
I am fairly certain it's D. Good luck!
SOLUTION is given in attachment below.