Which event led to the decline of Franz Mesmer’s brand of hypnosis? A. the advent of brain scanning technology B. a scientifically controlled experiment C. his own admission of fraudulent results D. the publication of an expose by an assistant

B. a scientifically controlled experiment

Explanation:

The event that led to the decline of Franz Mesmer's brand of hypnosis was a scientifically controlled experiment.

The hypnosis theoretized by Franz Mesmer was based on his belief in the existence of a form of energy transfer between living and non living things but this was debunked and eventually declined after the popularity of scientifically controlled experiment.

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