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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