Which neuromarketing technique looks for active areas in the brain by measuring the amount of oxygenated blood flowing through the body?

Question

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fMRI (functional magnetic resonance imaging) is a neuromarketing technique that utilizes magnetic fields to identify active areas in the brain by measuring the amount of oxygenated blood flowing through the body. This allows researchers to see which parts of the brain are being used during certain tasks or when exposed to certain stimuli. Eye tracking (A) measures eye movements to determine where a person is looking, while heat mapping (B) shows where people are looking or clicking on a webpage. EEG (D) measures electrical activity in the brain, but does not provide the same level of detail as fMRI.

Which Neuromarketing Technique Looks for Active Areas in the Brain