If We Look Back to the First Generation of Stars

Multiple Choice

If we look back to the first generation of stars made when the Galaxy was first forming, how do they differ from stars being formed today?

A) the first generation stars never become red giants
B) the first generation stars all live their lives much more slowly than stars today (so they last a long time)
C) the first generation stars cannot form planets of any kind
D) the first generation stars contain little or no elements heavier than helium
E) I disagree; I think first generation stars will be like stars forming today in all ways