The given scenario will fall in the category of quackery. The correct option is B.
Quackery is actually the promotion of certain fraudulent or ignorant medical practices. It is often synonymous with health fraud.
As in the given scenario, the commercial advertises a new bed that cures lower back pain overnight is a type of ignorant medical practices.
Thus, the correct option is B.
For more details regarding quackery, visit:
https://brainly.com/question/19633743
#SPJ1