Oscillatory networks based on the half-center model are unstable unless
A) there is a fatigue mechanism so that the first neuron that fires action potentials stops firing action potentials. B) there is a stabilizing mechanism that helps the first neuron that depolarizes to remain depolarized. C) there is a stabilizing mechanism so that the first neuron that fires action potentials keeps firing action potentials. D) there is a fatigue mechanism so that the external command stimulation stops.