Saturn's cloud surface appears more uniform than Jupiter's because:
A) there is a thick outer cloud covering of water ice overlying the colorful ices.
B) due to Saturn's lower gravity, the colorful cloud layers escaped.
C) it is composed of completely different gases than Jupiter's.
D) the cloud layers are thicker, allowing fewer holes to see the colorful layers.
E) due to Saturn's greater distance from the Sun, the colorful cloud layers are just not visible.