What are the relative compositions of the materials from which stars form?
A) About 74% hydrogen, about 24% helium, no more than 2% other materials
B) About 24% hydrogen, about 74% helium, no more than 2% other materials
C) About 2% hydrogen, about 74% helium, no more than 24% other materials
D) Stars have vastly differing combinations of materials.
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