When Distances Were Carefully Measured from Earth to Globular Clusters

When distances were carefully measured from Earth to globular clusters above and below the Milky Way plane (where our view of them is not obscured by interstellar dust and gas) ,their distribution was found to be

A) in a relatively flat disk almost perpendicular to the plane of the Galaxy,with relatively higher density of clusters toward its center.
B) spherically symmetric about a point in the constellation Sagittarius and concentrated in that direction.
C) concentrated in the plane of the Milky Way and clustered around the Sun's position,indicating that the Sun is close to the Galaxy's center.
D) uniformly distributed throughout space,with no concentration in any area of the Milky Way Galaxy.