If Jupiter and Saturn formed with the same chemical composition, why does Jupiter have more detectable helium than does Saturn?
A) Jupiter, being larger, has attracted more helium-bearing comets to add to its original composition.
B) Saturn has the smaller escape speed and much of its original helium has escaped.
C) Saturn's atmosphere is colder, and some of its helium has condensed and dropped to lower altitudes where it is harder to detect.
D) At Saturn's colder temperature, helium forms compounds, which decreases the amount of atomic helium.
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