What Do Astronomers Know About the Geometry of the Dark

Multiple Choice

What do astronomers know about the geometry of the dark matter distribution in the vicinity of the Milky Way Galaxy?

A) The dark matter appears to be a lens-shaped disk like the Galaxy's disk of visible stars, only larger.
B) The dark matter appears to be a spherical halo.
C) Dark matter, including that near the Milky Way Galaxy, appears to be part of a uniform density distribution that fills all space.
D) The geometry of the dark matter distribution, like its constituents, is totally unknown at the present time.