thE Four mAjor moDEs oF sEmAntiC ChAngE ArE ______. A．ExtEnsion, nArrowing, ElEvAtion AnD DEgrADAtion B．ExtEnsion, gEnErAlizAtion, ElEvAtion AnD DEgrADAtion C．ExtEnsion, nArrowing, spECiAlizAtion AnD DEgrADAtion D．ExtEnsion, ElEvAtion, AmEliorAtion AnD DEgrADAtion
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