Michael, a researcher in the field of neuroscience, has a theory about a specific area of the brain causing difficulties in face recognition. To draw a solid causal inference, he intends to test his hypothesis on dogs by disrupting regions of their brains and examining the effects of this disruption on the dogs’ face-recognition capacity. Which of the following techniques should be used by Michael to achieve his purpose?
a. computerized axial tomography (CAT scan)
b. functional magnetic resonance imaging (fMRI)
c. transcranial magnetic stimulation (TMS)
d. magnetic resonance imaging (MRI)

Through the application of transcranial magnetic stimulation (TMS), Michael will be able to alter the brain area that, according to his hypothesis, is responsible for facial recognition and verify the responses to such controlled alterations.

Throw the computerized axial tomography (CAT scan) and magnetic resonance imaging (MRI) he could only obtain get anatomical but not functional images, and throw the functional magnetic resonance imaging (fMRI) he could obtain functional images but he won't be able to alter any cerebral area; he could only observe the responses of different cerebral areas but without alter any of them.