If You Find a Halo Star That Is 13 Billion

If you find a halo star that is 13 billion years old and has the same amount of heavy elements as the Sun, should you be surprised?

A) No, because many halo stars have high fractions of heavy elements.
B) No, because this star probably escaped from a globular cluster.
C) No, because this star has been around a long time and has created a lot of heavy elements through nuclear fusion.
D) Yes, because most halo or globular cluster stars have few heavy elements.
E) Yes, because most halo stars are less than 10 billion years old.