The Appearance of the Sexually Dimorphic Nucleus in the Spinal

The appearance of the sexually dimorphic nucleus in the spinal cord of the adult rat is different in males and females because

A) the female does not have these cells at birth.
B) the cells have proliferated more rapidly in the males than in the females.
C) the cells stain more readily in the males than in the females.
D) perinatal cell death in this nucleus occurs more completely in females.