Which Best Describes Temporal Summation

Multiple Choice

Which best describes temporal summation?

A) A synapse is stimulated a second time before the effect of a first stimulus at the synapse has terminated.
B) It only refers to addition of EPSPs.
C) Two synapses on different regions of a cell are stimulated at the same time.
D) It always brings a postsynaptic cell to threshold.
E) The size of an EPSP depends on the size of the stimulus.