What Do Astronomers Mean When They Say That We Are

Multiple Choice

What do astronomers mean when they say that we are all "star stuff"?

A) that life would be impossible without energy from the Sun
B) that Earth formed at the same time as the Sun
C) that the carbon,oxygen,and many elements essential to life were created by nucleosynthesis in stellar cores
D) that the Sun formed from the interstellar medium: the "stuff" between the stars
E) that the Universe contains billions of stars