题目内容：
Questionsarebasedonthefollowingpassage:
Ayoungster'ssocialdevelopmenthasaprofoundeffectonhisacademicprogress．Kidswhohavetroublegettingalongwiththeirclassmatescanendupbehindacademicallyaswellashaveahigherchanceofdroppingout(退学)．Intheearlygradesespecially,expertssay,youngstersshouldbeencouragedtoworkingroupsratherthanindividuallysothatteacherscanspotchildrenwhomaybehavingproblemsmakingfriends．"Whenchildrenworkonproject,"saysLillianKates,aneducationalprofessorattheUniversityofIllinois,"theylearntoworktogether,todisagree,tothink,totaketurnsandlightentensions．Theseskillscan'tbelearnedthroughlectures．Weallknowpeoplewhohavewonderfultechnicalskillsbutdon'thaveanysocialskills．RelationshipsshouldbethefirstR．"
Atacertainage,childrenarealsolearningtojudgethemselvesinrelationtoothers．Formostchildren,schoolmarksthefirsttimethattheirgoalsarenotsetbyaninternalclockbutbyheoutsideworld．Justasthe1-year-oldstrugglestowalk,the6-year-oldisstrugglingtomeetadultexpectation．
"Youngkidsdon'tknowhowtodistinguishbetweeneffortandability,"saysTynetteHills,professorofearly-childhoodeducationforthestateofNewJersey．"iftheytryhardtodosomethingandfail,theymayconcludethattheywillneverbeabletoaccomplishaparticulartask．""Theeffectsofobviousmethodsofcomparisonsuchaspostinggradescanbeserious,"saysHills,"achildwhohashadhisconfidence
reallydamagedneedsarescueoperation．"
Theauthorseemstothinkthatakid'spoorrelationshipwithhisclassmateswould（ ）． A．havenegativeeffectsonhisstudy
B．develophisindividualismbutlimithisintelligence
C．eventuallyleadtohisleavingschool
D．havesomethingtodowithhisachievementsinacourse
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答案解析：