In a photo like the Hubble Deep Field (Figure 20.1 in your textbook), we see galaxies in many different stages of their lives. In general, which galaxies are seen in the earliest (youngest) stages of their lives?
A. the galaxies that are farthest away
B. the galaxies that we see to have the most hot, young O and B stars
C. the galaxies that are the reddest in color
D. the galaxies that are nearest to us.