A Patient with Chronic Back Pain That Is Unrelieved by Prescription

A patient with chronic back pain that is unrelieved by prescription analgesic medications asks a primary care nurse practitioner (NP) about acupuncture treatments.The NP should tell this patient:

A) biofield therapy has been shown to be more effective than acupuncture.
B) creatine has been shown to be an effective herbal choice to treat back pain.
C) there is no valid research documenting the efficacy of this treatment for pain.
D) most studies that show benefits of alternative therapies are based on observation.