Answer:
B.functional magnetic resonance imaging (fMRI)
Explanation:
Functional magnetic resonance imaging: The term functional magnetic resonance imaging is also referred to as functional MRI which is responsible for measuring an individual's brain activity via detection of changes related to the blood flow. It is based on the phenomenon which states that the neuronal activation and cerebral blood flow are considered as coupled. The blood flow in the area of the brain increases if its in use.
In the question above, the given statement represents the functional magnetic resonance imaging.