Why Are the Majority of Stars in the Sky in the Main-Sequence

Multiple Choice

Why are the majority of stars in the sky in the main-sequence phase of their lives?

A) This is the longest-lasting phase in each star's life.
B) Most stars die at the end of the main-sequence phase.
C) This is the only phase that is common to all stars.
D) Most stars in the sky were created at about the same time,so they are all in the same phase of their lives.