What is the source of most of the carbon and oxygen in the interstellar medium?
A) the Big Bang
B) nova explosions
C) supernova explosions
D) winds from asymptotic giant branch stars

Question

Quizplus · Accepted Answer

Winds from asymptotic giant branch stars are the source of most of the carbon and oxygen in the interstellar medium. These stars are in the late stages of their lives and have lost their outer layers, which are rich in carbon and oxygen. These elements are then dispersed into the interstellar medium, where they can be incorporated into new stars and planets.

What Is the Source of Most of the Carbon and Oxygen