A star's life cycle is similar to that of a living organism in which of the following ways?

A. A star requires a continual supply of material from other stars in order to survive for long periods of time.

B. A star fits into an ecological niche within its galaxy. Each star competes with other stars for a limited amount of resources.

C. All stars were born when the universe began and will endure until the end of time.

D. A star undergoes many different stages during its life. And after it dies, the material that made it up can be used by future stars.