How Do Temporal and Spatial Summation Improve the Processing Power

How do temporal and spatial summation improve the processing power of the brain?

A) Temporal summation allows circadian rhythms to regulate neuronal activity.Spatial summation allows latitude to regulate neuronal activity.
B) Temporal summation allows a neuron to fire prolonged action potentials,and spatial summation allows a neuron to synapse onto new targets.
C) Temporal and spatial summation both make the neuron more likely to fire action potentials.
D) Temporal summation allows a neuron to recognize a persistent signal from a single presynaptic cell,and spatial summation allows a neuron to recognize a broad signal from multiple presynaptic cells.