What event happens that transitions a star into a red giant?

a. A Supernova explosion
b. Dust and gas begin to compress under the force of
gravity.
c. Star burns all it's hydrogen and fuses helium

a supernova explosion

Explanation:

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answer; ///i do believe that the correct answer is (c) hold atoms together to form compound;

we need additional information in order to determine the cause of death for anna garcia. there are at least 3 things with explanation included as to why we need them are as follows: