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

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 orbit the galactic center at a much higher rate of speed.
D) It should be much brighter.
E) All of the above would be expected.

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