Which of the following does NOT fit the definition of the black hole? Why does the author put "neutron star" in quotation marks

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问题 Which of the following does NOT fit the definition of the black hole?
Why does the author put "neutron star" in quotation marks?

选项 A、It is a special term of astronomy.
B、It is an invented term.
C、He is quoting an authority.
D、He is using the term ironically.