Why Is the Neuron Sometimes Called the Workhorse of the Nervous

Why is the neuron sometimes called the workhorse of the nervous system?

A) Because 98.8 percent of the neurons in the human body reside in the brain
B) Because the neuron has the ability to detect stimuli both in the world as well as in the body
C) Because the neuron has the capacity to do all the three functions: receive,integrate,and transmit neural information
D) The brain is called the workhorse of the nervous system and not the neuron.