What Causes the Distinct Bluish Tint of the Ice Giants

What causes the distinct bluish tint of the ice giants Uranus and Neptune?

A) Methane in their atmospheres preferentially absorbs the red component of the Sun's light and reemits the blue part, imparting the bluish tint.
B) Water ice in their atmospheres preferentially absorbs infrared light from the Sun and reemits the blue part, imparting the bluish tint.
C) There is less red light from the Sun reaching ice giants at their large distances, resulting in their bluish appearance.
D) The clouds consist of hydrocarbons producing their own light, which comes out in the blue region of the spectrum.
E) Metallic hydrogen within the planet reflects blue light but not red light.