How would each of the following changes affect the demand cure for acupuncture?
A. The price of an acupuncture session increases.
B. A reduction in back problems occurs as a result of sessions on stretching on a stretching on a popular television show.
C. Medicare reduces the copayment for acupuncture from $20 to $10.
D. The surgeon general issues a warning that back surgery is ineffective.
E. Medicare stops covering back surgery.