Brian Banged His Shin Against a Desk and Grimaced with Pain

Multiple Choice

Brian banged his shin against a desk and grimaced with pain. He quickly bent over and began rubbing his leg where he'd banged it and the pain he was experiencing started to subside a bit. This phenomenon can best be explained by __________

A) the gate-control theory.
B) the absolute-threshold theory.
C) the opponent-process theory.
D) the volley theory of pain control.