Consider this situation (both described and drawn for you): …

Consider this situation (both described and drawn for you):    Neuron A forms an inhibitory synapse on the cell body of neuron B Neuron C forms an excitatory synapse on the cell body of neuron B Neuron D exerts pre-synaptic inhibition on the axon terminal of neuron A  In which of the following circumstances would an action potential be least likely to occur in neuron B?