How Would You Expect a Star That Formed Recently in the Disk

Multiple Choice

How would you expect a star that formed recently in the disk of the galaxy to differ from one that formed early in the history of the disk?

A) It should be higher in mass.
B) It should have a higher fraction of elements heavier than hydrogen and helium.
C) It should be much brighter.
D) It should orbit the galactic center at a much higher rate of speed.
E) All of the above would be expected.