<篇章結構>第31至34題為題組 Once thought to be extremely rare， synesthesia is now found to affect about one to four percent of the population. __34__ As is often observed， most of us tend to associate lower notes with darker colors and higher notes with brighter colors. Researchers further point out that in most people synesthesia is active only during the first months of their infancy， while this ability remains forever in certain individuals. (A) This consistency serves as a proof that synesthesia is real. (B) Meanwhile， environmental influences seem to shape a person’s synesthesia. (C) People with synesthesia used to be accused of making their experiences up. (D) Some studies even show that people may all be synesthetic to some degree.
