The cloud of interstellar dust and gas that forms a star is known as a

A. white dwarf.

B. protostar.

C. nebula.

D. red giant.

The answer should be C. - A nebula (from Latin: "cloud"; pl. nebulae or nebulæ, with ligature, or nebulas) is an interstellar cloud of dust, hydrogen, helium and other ionized gases. As the cloud collapses, the material at the center begins to heat up to form the protostar