A. Because they reflect their color and absorb all the others
Sound is an example of a mechanical wave. Mechanical waves are the kinds of waves that cannot be propagated without a medium. As such, these waves cannot travel through a vacuum, just like how sound cannot travel through space, since space is a vacuum.
I think your answer would be (D) microscope with a video camera
Hope i helped!
Sorry I'm so late, but I just took this test and the answer is white (for people who didn't study well ;) )
