Which of the following statements about the "helium flash" is correct?
A. It releases enough energy to change the degenerate gas in the core to normal gas.
B. It does not occur in high-mass stars.
C. It marks the end of the red giant stage for a star like the Sun.
D. It does not occur in stars smaller than 0.5 solar masses.
E. All of these choices are correct.
Answer: E
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