The Existence of the "Erection Reflex Centre

The existence of the "erection reflex centre"

A) is basically a hypothesis that helps to explain why males are able to get erections without thinking sexually.
B) has been substantiated by the sexual responses of men who have had their spinal cords severed above the centre.
C) helps us to understand why men are more likely to be sexual athletes than are women.
D) helps to explain how the blood flow to the penis results in an erection when the "centre" causes muscles around the base of the penis to tighten into a noose in order to hold the blood in the corpora cavernosa.