The Stimulus Threshold of the Neuron Refers to The

The stimulus threshold of the neuron refers to the:

A) minimum level of stimulation required to activate a particular neuron.
B) 3-to-1 ratio of positive-to-negative ions required for one neuron to transmit information to the next neuron.
C) positive electrical charge on the neuron's interior just prior to neuron activation.
D) minimum level of stimulation required to inhibit a neuron from firing.