题目内容：
Which of the following is NOT the possible reason that acupuncture works?
A．Acupuncture somehow affects the central nervous syste B．Acupuncture makes contact with an unknown system of energy in the bod
C．Acupuncture generates the immuno-transmitter
D．Acupuncture produces a chemical change in the body's fluid
参考答案：
答案解析：