Which Statement About Autonomic Nervous System Control of a Mammalian

Which statement about autonomic nervous system control of a mammalian heartbeat is false?

A) Acetylcholine is a parasympathetic neurotransmitter that influences ion channels of pacemaker cells.
B) The heart slows down in response to acetylcholine.
C) Acetylcholine increases permeability of Ca²⁺ channels.
D) Norepinephrine is a sympathetic neurotransmitter that influences ion channels of pacemaker cells.
E) Acetylcholine increases the permeability of K⁺ channels.