Why Aren't All Clouds on Jupiter White, Like on Earth

Why aren't all clouds on Jupiter white, like on Earth?

A) Jupiter's clouds are made of methane.
B) Jupiter's clouds are made of carbon dioxide.
C) There are chemical impurities in the ice crystals in Jupiter's clouds.
D) The Sun is not as bright when viewed from Jupiter compared to what it looks like from Earth.
E) For the same reason that we see colors in rainbows on Earth.