For the Following Questions, Assume a Hypothetical Postsynaptic Neuron Has

For the following questions, assume a hypothetical postsynaptic neuron has three presynaptic inputs: neurons X, Y, and Z. Also, assume neuron Z is excitatory. What would you expect at the postsynaptic neuron when neuron Y is stimulated? (Remember that the postsynaptic neuron's membrane potential is decreased by neuron Y.)

A) increased P_Na+ and P_K+
B) increased P_K+ or P_Cl-
C) increased P_A-
D) increased P_Ca2+
E) none of these