Just as a Low-Mass Main-Sequence Star Runs Out of Fuel

question 47

Multiple Choice

Just as a low-mass main-sequence star runs out of fuel in its core,it grows more luminous.How is this possible?

• A) It explodes.
• B) It begins to fuse helium in the core.
• C) Its core expands as it runs out of fuel.
• D) Its core shrinks,bringing more hydrogen fuel into the burning region.

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