Which Statement Is NOT True of the Urination Reflex

Multiple Choice

Which statement is NOT true of the urination reflex?

A) Voluntary control is provided by the external urethral sphincter.
B) As part of the reflex, the internal urethral sphincter contracts.
C) The effector of the reflex is the detrusor muscle of the urinary bladder.
D) This reflex is a spinal cord reflex.