题目内容：
根据以下材料，回答题Itmaybepointedoutthatwarfare(战争)aspracticedbymanhasnoparallelinnature.Thisistosaythatwithinthemorehighlydevelopedanimalpopulationsofthisearth,thereisnotnow,norhastherebeensimilardestructionwithin
aspecies(物种)itself.Infact,onehastogotothelowhestformsofanimallife,suchascertainkindsofants,tofindanythingcomparabletohumanwarfare.Itisacuriousfactthatmankindappearstogivethe
killingofhisownkindagoodreasonbyimagingthatitisa"lawofnature".Therearenowalotofwrongideasaboutthelawsofnature,ofwhichthisisoneofthemostincorrectandfateful(致命的).Politicalbeliefshavebeenbaseduponitwithresultsthathavecomeneartodestroyinghumancivilization.Thetheorythatwarisabiologicalnecessity,thatitisnature'smethodofcontrolling
populationandbelievinginthesurvival(生存)ofthestrongandtheelimination(灭亡）oftheweak,istotallywrongandinsupportable.Withinthelastcentury,whenwarshavebeencommonallovertheworld,thehumanpopulationoftheearthhasalmostdoubled.
Themainideaofthispassageis A．warfareisa"lawofnature"
B．warfareisnota"lawofnature"
C．warfaredoesnotcontrolhumanpopulation
D．noneofthelowlieranimals,exceptants,practicewarfareupontheirownspecies
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