The nervous system consist of the brain, spinal cord and nerve fibers. Exercise Improves the brain
That's the answer to the question
The correct answer is B) the North Vietnamese and Vietcong's war strategy was to avoid defeat until the Americans gave up.
They were always on the retreat and resorted to guerrilla warfare. They would hide, attack at night, set traps, and other similar tactics until they completely demoralized the American army.
