Jupiter contains a number of small moons that are thought to be captured comets or material ejected by collisions with larger objects. What is the evidence for this theory?
A) They are too big to have been formed during planetary accretion.
B) Analyses from spacecraft show they have compositions completely different than Jupiter or its moons.
C) Their orbits are highly elliptical, off the plane of the ecliptic, and many are retrograde, which is unlikely for satellite formed during planetary accretion.
D) Spacecraft have sampled them, and they are known to be comets.
C
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