The Helium Flash Is Another Name for a Sudden

The helium flash is another name for a sudden

A) release of energy at the end of helium burning due to core contraction.
B) onset of helium fusion reactions in red giant and supergiant stars of any mass.
C) onset of helium fusion reactions in the core of a low-mass red giant star.
D) appearance of helium during a supernova explosion (explosion of a star at the end of its life) .