All of these are necessary
Answer: The answer is D. Unless light goes through a medium (like water or air) then light would be at its fastest speed going through a vacuum.
I think the answer is, hyperuria...? dbl.cck...
<span>B) Earth revolving around the sun and the sun's light being reflected off the moon because the moon orbits earth and earth orbits the sun so the sun lights the moon
Signed by, Virtuoso Sargedog
</span>
