A Recent Commercial Advertised for a Wristband That Claimed to Restore

A recent commercial advertised for a wristband that claimed to restore health and balance by taking advantage of natural frequencies of your biofield.It supports its claim by showing several people first struggling to balance without the wristband and then balancing fine with the wristband.Why should you be skeptical of the claims made in this ad?

A) Health cannot be tested via the scientific method.
B) You cannot believe anything you see on television.
C) The study was too objective.
D) It was not a controlled experiment.