Which of the Following Statements About the Coordination of the Heartbeat

Which of the following statements about the coordination of the heartbeat is FALSE?

A) Each heartbeat is generated by signals from the nervous system that stimulate the heart's pacemaker cells.
B) Cardiac muscles are in electrical continuity, which allows for synchronous contraction of the two atria followed by synchronous contraction of the two ventricles.
C) Under normal conditions, the electrical separation between the atria and ventricles prevents all four chambers from contracting synchronously.
D) Following activation of the AV node, the action potential is transmitted to the base of the ventricles by a modified set of cardiac muscle fibers.
E) None of the answer options is false.