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. If neurotransmitter from Y causes the membrane potential of the postsynaptic cell to decrease slightly, then the

A) synapse is excitatory
B) postsynaptic membrane's potential will be farther away from threshold
C) postsynaptic membrane could be excitatory or inhibitory
D) neurotransmitter from Y causes an IPSP on the presynaptic membrane
E) postsynaptic membrane's potential will be farther away from threshold, and the neurotransmitter from Y causes an IPSP on the presynaptic membrane