The Oldest Disk Stars Are Both ________ and ________ Compared

Multiple Choice

The oldest disk stars are both ________ and ________ compared with halo stars.

A) younger; have higher fractions of heavy elements
B) older; have higher fractions of heavy elements
C) younger; have lower fractions of heavy elements
D) older; have lower fractions of heavy elements
E) younger; similar fractions of heavy elements