Which of the following electrical events is characteristic of inhibitory synaptic interactions?

A、A neurotransmitter agent that selectively opens ligand-gated chloride channels is the basis for an inhibitory postsynaptic potential;
B、Because the Nernst potential for chloride is about -70 mV, chloride ions tend to move out of the cell along its electrochemical gradient;
C、A neurotransmitter that selectively opens potassium channels will allow potassium to move into the cell;
D、An increase in the extracellular sodium concentration usually leads directly to an inhibitory postsynaptic potential