The Atmospheres of Jupiter and Saturn Have Many Zonal Bands

Multiple Choice

The atmospheres of Jupiter and Saturn have many zonal bands moving in alternate directions parallel to the equator,but Uranus's atmosphere appears to have only a few.What is believed to be the reason for this difference?

A) Uranus is significantly smaller than Jupiter or Saturn.
B) Because of the extreme tilt of Uranus's rotation axis,the planet's equatorial regions are not always facing the general direction of the Sun.
C) There is little internal heating on Uranus to influence motions in its atmosphere.
D) The rotation of the core of Uranus is opposite that of the atmosphere.