Which of the following is incorrect about stimulation of striated muscle contraction by the neuromuscular junction?

A)Acetylcholine is stored in vesicles in the axon terminal.
B)Acetylcholine is secreted in response to a nerve action potential.
C)Acetylcholine binds to soluble receptors in the extracellular environment.
D)Acetylcholine binding stimulates sodium ions to enter the muscle cell.
E)T tubules carry action potentials into the muscle cell.