Sir William Herschel Counted the Number of Stars in Different

Sir William Herschel counted the number of stars in different directions, and getting similar numbers in each direction along the disk, concluded the Sun was near the center of a disk like collection of stars. Herschel came to the wrong conclusion about the Sun's location because

A) He was predisposed to believe the Sun was in the center of the Milky Way, and ignored data which disagreed with that conclusion.
B) He did not know that interstellar dust made it hard for him to see a large part of the Milky Way's disk.
C) He only counted globular clusters, and not regular stars.
D) The Sun's position in the Milky Way at that particular time was very unusual and skewed his results.