What Should Be True About the Oldest Stars in the Milky

What should be true about the oldest stars in the Milky Way?

A) They would have lots of heavy elements because they have been around for a long time and have undergone a lot of nucleosynthesis in their cores.
B) They would be seen as supergiants.
C) They would have few heavy elements because there was not much chance for earlier generations of stars to explode as supernovae before these stars were formed.
D) They would be massive because they were among the first stars formed.
E) They would likely be seen as pulsars.