Which of the following best defines'higher brain centers'as the term is used in the passage?
A.
The parts of the brain known as the somatosensory cortex, where the sensations of pain are processed.
B.
The pans of the brain whose function is to distinguish the sensory aspects of pain from it suffering aspect.
C.
The parts of the brain known as the anterior cingulate cortex,whose activity is suppressed by hypnosis.
D.
The parts of the brain associated with pain,which appear to be insusceptible to placebo effects.