Compared to Other Alternative Medicine Techniques Like Acupuncture and Meditation,how

Compared to other alternative medicine techniques like acupuncture and meditation,how effective is biofeedback at helping to reduce stress?

A) Biofeedback is far more effective than meditation, but less effective than acupuncture.
B) Biofeedback is not significantly more effective, and it requires expensive equipment.
C) Biofeedback, acupuncture, and meditation are all rather in effective.
D) Biofeedback is far less effective than meditation and acupuncture.