-Refer to the H-R Diagram

Multiple Choice

-Refer to the H-R diagram.How would the H-R diagram of an older star cluster look different?

A) The points would shift to the right, because all of the stars would have lower temperatures.
B) The lower main sequence would look the same, but the turnoff would be at spectral type K or M.
C) The points would shift down, because all of the stars would have lower luminosities.
D) The lower main sequence would look the same, but the turnoff would be at spectral type F or A.