An Absorption Spectrum Can Be Found in Light Collected by a Telescope

An absorption spectrum can be found in light collected by a telescope because ____.

A) as light passes through the cooler, outer layers of a star, some wavelengths are selectively absorbed by atoms in the star's atmosphere
B) planets absorb light rather than emit it
C) stars do not produce light at certain wavelengths
D) some wavelengths of light travel more slowly than others, and so are missing from the light collected by a telescope