A Unique Feature of the FMRI, as Compared to the MRI

A unique feature of the fMRI, as compared to the MRI, is the capacity to

A) detect cell activity throughout the brain.
B) measure the magnetic fields in the brain.
C) control brain activity by stimulating various brain regions.
D) take a detailed X-ray of the brain while the person is conscious.
E) distinguish more active tissues from less active ones.