Why did the American journalist go to a Shanghai hospital?
A.To observe how acupuncture is used in an operation.
B.To talk to a patient who has an operation with acupuncture as anesthesia.
C.To learn how acupuncture can relieve pain.
D.To see what the acupuncture needles are like.
请帮忙给出正确答案和分析,谢谢!