When the Bladder of an Infant Is Filled with Urine

When the bladder of an infant is filled with urine, the

A) stretch receptors in the bladder wall are inhibited
B) parasympathetic nerve supplying the bladder is inhibited, allowing the bladder to relax
C) motor neuron supplying the external urethral sphincter is stimulated, causing the sphincter to open
D) motor neuron supplying the external urethral sphincter is inhibited, allowing the sphincter to open
E) parasympathetic nerve supplying the internal urethral sphincter is stimulated, causing the sphincter to close