The most basic difference between elliptical galaxies and spiral galaxies is that ________.
A) elliptical galaxies lack anything resembling the disk of a spiral galaxy
B) elliptical galaxies lack anything resembling the halo of a spiral galaxy
C) elliptical galaxies have a spheroidal component (of stars distributed spherically about the galactic center) , and spiral galaxies do not
D) elliptical galaxies are very old and spiral galaxies are very young
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