题目内容：
根据短文，回答题HumanintelligenceandtheIQscalesusedtomeasureitonceagainarebecomingthefocusoffierydebate．Asargumentragesoverdecliningtestscoresinthenation’sschools，anoldbutexplosiveissueisreappearing：Whatisintelligenceandisitdeterminedlargelybygenetics?
ThecontroversyeruptedmorethanadecadeagowhensomeUSscholarssawaracialpatterninthedifferingscoresofstudentstakingintelligenceandcollege-entrancetests．
Now，theracialissueisbeingjoinedbyothers．Teachers，psychologists，sclentlstsandlawyersargu。overthequestionofwhetherIQ—intelligencequotient—testsactuallymeasurementalability,orii士lndmgsareskewedbysuchfactorsasfamilybackground，povertyandemotionaldisorders-
Moreover，someauthoritiesassertthattheriseinthenumberofcollege-educatedAmericansandtheirtendencytomarryamongthemselvesarecreatingaclassofsuper-smartchildrenofbrainyparents—and'ontheothersideofthescale，alumpenproletariatofchildrenreflectingthesupposedlyinferiorbrainpoweroftheirparents,
CriticssuchasHarvardUniversitybiologistRichardC.Lewontindisagree．Ifmentalabilitywerelargelydeterminedbvinheritance，hesays，effortstoenhanceintelligencethroughthebettermentofbothhomeandchild-rearingenvironmentscouldonlybemarginallyeffective．Hecomments：
"Geneticdeteminismcouldbeusedtojustifyexistingsocialinjusticeaspredeterminedandinevitableandwouldrendereffortsmadetowardequalitariangoalsasuseless．"
SupportingLewontininthisisJ．McViekerHunt，aprofessorattheUniversityofIllinois，whomaintainsthatIQlevelscanberaisedsignificantlybyexposingchildrenatanearlyagetostimulatingenviroments．Hunt’sstudiesshowthatearlyhelpinsuchareasaseducationandnutritioncanraiseachildsIQbyaDaverageof30to35points．
AtstakeintheuproaroverIQisthenationalcommitmenttoimprovethecapabilitiesoithepoorbyinvestingbillionsofdollarsannuallyineducational，medicalandjobprograms．ThecontroversyoverIQtestsisreappearingbecauseof__________． A．thenewlyfoundracialpatternunderlyingstudents’performance
B．theworseningstudents’performanceintheirstudies
C．thelong-standingdivisioninthedefinitionofintelligence
D．thedubiousIQscalesusedtomeasureintelligence
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