Astronomers Expect Life to Be Rare (And Maybe Impossible) in the Milky

Astronomers expect life to be rare (and maybe impossible) in the Milky Way's bulge because

A) there are so many stars that no material is left over to make planets.
B) the bulge is too poor in heavy elements.
C) the tidal force of the central black hole would strip stars of their planets.
D) the lack of green and blue photons from younger stars would make photosynthesis impossible.
E) the amount of radiation in the central regions is very high.