Stars. A star's life cycle is determined by its mass: the larger its mass, the shorter its life cycle. Regardless of a star's mass though, all stars follow the same path from origin to main sequence star. Read the prompt and place the steps in the correct order. A. Hydrogen in star's core is converted into helium by nuclear fusion.

B. Hydrogen gas in a nebula is pulled together by gravity and begins to spin.

C. The temperature of the protostar reaches 15 million degrees C.

D. As the hydrogen gas spins faster, it heats up and becomes as a protostar.

E. The star begins to glow brightly, contracts, and becomes stable

A) A, B, D, C, E

B) B, D, C, A, E

C) D, B, A, E, C

D) B, C, A, D, E