Why Are We Unlikely to Find Earth- Like Planets Around

Multiple Choice

Why are we unlikely to find Earth- like planets around halo stars in the Galaxy?

A) Halo stars formed from gas containing few heavy elements, the elements needed to create terrestrial planets like the Earth.
B) Halo stars formed directly from gas in the halo without forming a planetary disk.
C) Halo stars formed from gas containing lots of heavy elements and few of the light elements needed to create terrestrial planets like the Earth.
D) Planets around stars are extremely rare in our Galaxy.
E) Halo stars are all very low mass stars that cannot hold onto planets.