Verified Answer :

Answer:

the answer is C neutron star.

Explanation:

Answer:

Neutron Star

Explanation:

"If the remaining core contains about 1.4 solar masses within a 20 km radius, it can become a neutron star."

If you are trying to find what a core will become with 3 or more solar masses, you are on the wrong question.

Neutron star is the correct answer for a core of a supernova containing about 1 solar mass.

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