From thE pAssAgE wE know thAt thE nErvE impulsEs in humAn BEings ______.
A．ArE lACk oF DiFFErEntiAtion in quAlity
B．ArE similAr in sizE, numBEr, AnD ArrAngEmEnts
C．rEvEAl quAlitAtivE DivErsity
D．spAsmoDiCAlly pAss through thE nErvous systEm