Why are Uranus and Neptune known as ice giants, rather than gas giants?
A. Their interiors may contain large quantities of water ice and other ices under tremendous pressure.
B. Their interiors may contain liquid water and other materials that would be ices if not for the hot cores of those planets.
C. Uranus and Neptune are much colder than Jupiter or Saturn.
D. Uranus and Neptune are much smaller than Jupiter or Saturn.
E. None of these choices are correct.
Answer: B
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