Visible light that radiates from the sun travels through the atmosphere in all colors of the spectrum. why is the sky blue?

a) other wavelengths of visible light are reflected back toward the sun.
b) as light enters the atmosphere, the blue color of the sky is a reflection of the oceans.
c) the sun only produces visible light in the blue wavelength.
d) visible light of blue wavelength is shorter and is scattered more by the atmosphere, making it appear blue.
e) other wavelengths of light are absorbed in space before visible light reaches earth.