ACCorDing to thE pAssAgE, "inFrAlimBiC nEurons ... FirE to thE tonE only whEn rAts ArE rECAlling ExtinCtion on thE Following DAy" (linEs 7-9) For whiCh oF thE Following rEAsons
A．ExtinCtion hAs not BEEn provEn to ErAsE thE mEmory oF FEAr ConDitioning in rAts.
B．thE ExtinCtion rEsponsE rEquirEs A numBEr oF DAys to DEvElop.
C．thE suBjECt's originAl FEAr rEsponsE wAs not ConDitionED to A tonE.
D．thE inFrAlimBiC CortiCEs CArry thE mEmory oF FEAr ExtinCtion.
E．(E) rAts thAt show thE lEAst FEAr DEmonstrAtE thE grEAtEst inCrEAsE in inFrAlimBiC tonE rEsponsEs.