which of these forms as part of the life cycles of both low - mass and high - mass stars as a result of a…

which of these forms as part of the life cycles of both low - mass and high - mass stars as a result of a star - forming nebula collapsing and spinning?\no protostar\no black hole\no supernova\no white dwarf
Answer
Brief Explanations:
When a star - forming nebula collapses and spins, a protostar forms in the life - cycles of both low - mass and high - mass stars. A black hole forms only in the end - stage of high - mass stars. A supernova is an explosion at the end of a high - mass star's life. A white dwarf is the end - stage of a low - mass star.
Answer:
A. protostar