When Using Acupuncture for Pain Relief It Has Been Found

When using acupuncture for pain relief it has been found that the pain relief experience is dependent on the

A) expertise of the person inserting the needles
B) the type of needles used (e.g.steel,gold,or other metals)
C) correct location of acupuncture points
D) intensity of the stimulation
E) social acceptance of the theory underlying its use