Although Probably Impossible to Experiment With, a Person Is Surprised

Although probably impossible to experiment with, a person is surprised by being struck with equal force in the face by two other people: one familiar (a loved one) and one complete stranger. The pain felt by the struck person is seems greater if (s) he is struck by the familiar person than if struck by the complete stranger. This subjective difference in sensation of these two identical forces is processed by the

A) primary somatosensory cortex.
B) secondary somatosensory cortex.
C) somatosensory association cortex.
D) anterior cingulate cortex.
E) central sulcus.