The Factor That Misled Herschel into Concluding That the Stars

Multiple Choice

The factor that misled Herschel into concluding that the stars of the Milky Way were distributed with the Sun at the center of the Milky Way Galaxy was

A) hot hydrogen gas in the Galaxy, its emission hiding the more distant stars.
B) interstellar dust that obscured the more distant stars and thereby localized his observations.
C) gravitational bending of light by the mass of the Galaxy, distorting the relative positions of the stars.
D) that most of the "stars" he measured were in fact distant galaxies that are distributed uniformly around the Sun.