"All or None" Is the Principle Stating That

"All or none" is the principle stating that

A) a neuron either fires or does not fire
B) a neuron fires at full strength or not at all
C) all the dendrites must be receiving messages telling the neuron to fire or it will not fire at all
D) all somas must be receiving messages telling the neuron to fire or it will not fire at all
E) all neurotransmitters must be released at one time, or none will be released at all.