According to the passage, each of the following statements regarding synesthesia is true EXCEPT
A.researchers have not yet fully explained the mechanisms behind synesthesia
B.synesthetic perceptions are unique to the individual synesthete
C.the term ’synesthesia’ derives from a combination of Greek root words
D.the various permutations of synesthesia suggest that individuals experience shifting inter-sensory associations
E.researchers have so far failed to catalog all of the various sensory pairings experienced by synesthetes