Which event triggers the start of black hole formation? (1 point)
Responses
A small to medium mass star explodes as a supernova.
A small to medium mass star explodes as a supernova.
The gravitational forces acting on a massive star push it outward rapidly.
The gravitational forces acting on a massive star push it outward rapidly.
A massive star depletes its stores of hydrogen and helium.
A massive star depletes its stores of hydrogen and helium.
Radiation emitted by a massive star increases.