In the Hubble Classification Scheme for Spiral Galaxies,the Tightness of the Winding

Multiple Choice

In the Hubble classification scheme for spiral galaxies,the tightness of the winding of the spiral arms appears to be directly related to the

A) overall intrinsic size of the galaxy,or the diameter across the spiral arms.
B) number of globular clusters in the halo of the galaxy.
C) age of the galaxy,as determined from the age of its individual stars.
D) size of the central bulge of the galaxy.