One Hypothesis of Synesthesia Is That ____

 One hypothesis of synesthesia is that ____.

A) all of the axons from one cortical area have more branches into that cortical area.
B) all of the axons from one cortical area have branches into another cortical area.
C) some of the axons from one cortical area have branches into another cortical area.
D) some of the axons from one cortical area have more branches into that cortical area.