Read the sentence from the section "Two Key

Parts Make Up Nuclear Fusion."

This means the end of the line for small

stars, who quietly fade into darkness

after they have used up their hydrogen.

The phrases "end of the line" and "fade into

darkness" in the sentence give the reader a sense

А

that the stars suddenly die

B

that the stars gradually disappear

that the stars become too dim to see

D

that the stars need more hydrogen for energy

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