Which of the Following Statements Describes Correctly How the Atmosphere

Which of the following statements describes correctly how the atmosphere of Neptune differs from that of Uranus?

A) Neptune's atmosphere is almost featureless, whereas the atmosphere of Uranus shows wispy clouds and whirlpool-like vortices.
B) Methane clouds form in Neptune's atmosphere, but not in that of Uranus, because of Neptune's much greater distance from the Sun.
C) All parts of Neptune's visible atmosphere rotate at the same speed, whereas different parts of the atmosphere of Uranus rotate differently.
D) Neptune's atmosphere shows considerable vertical convective motion in addition to east-west circulation, whereas Uranus's atmosphere has very little up-and-down motion.