When Several IPSPs Arrive at the Axon Hillock Rapidly in Sequence

Multiple Choice

When several IPSPs arrive at the axon hillock rapidly in sequence from a single presynaptic location,hyperpolarizing the postsynaptic cell more and more and thus preventing an action potential,this is an example of

A) temporal summation.
B) spatial summation.
C) tetanus.
D) the refractory state.
E) an action potential with an abnormally high peak of depolarization.