题目内容：
根据下列材料，请回答题：ThePacificislandnationofNauruusedtobeabeautifulplace.Nowitisanecologicaldisasterarea.Nauru’sheartbreakingstorycouldhaveonegoodconsequence—othercountriesmightlearnfromitsmistakes.Forthousandsofyears,PolynesianpeoplelivedtheremoteislandofNauru,farfromwesterncivilization.ThefirstEuropeantoarrivewasJohnFearnin1798.HewastheBritishcaptainoftheHunter,awhalingship.HecalledtheislandPleasantIsland.
However,becauseitwasveryremote,NauruhadlittlecommunicationwithEuropeansatfirst.Thewhalingshipsandothertradersbegantovisit,bringinggunsandalcohol.Theseelementsdestroyedthesocialbalanceofthetwelvefamilygroupsontheisland.Aten-yearcivilwarstarted,whichreducedthepopulationfrom1,400to900.
Nauru’srealtroublesbeganin1899whenaBritishminingcompanydiscoveredphosphate(磷酸盐)ontheisland.Infact,itfoundthattheislandofNauruwasnearlyallphosphate,whichaveryimportantfertilizerforfarming.Thecompanybeganminingthephosphate.
Aphosphatemineisnotaholeintheground;itisastripmine.Whenacompanystrip-mines,itremovesthetoplayerofsoil.Thenittakesawaythematerialitwants.Stripminingtotallydestroystheland.Gradually,thelovelyislandofNaurustartedtolooklikethemoon.
In1968,Naurubecameoneoftherichestcountriesintheworld.Everyyearthegovernmentreceivedmillionsandmillionsofdollarsforitsphosphate.
Unfortunately,theleadersinvestedthemoneyunwiselyandlostmillionsofdollars.Inaddition,theyusedmillionsmoredollarsforpersonalexpenses.Soonpeoplerealizedthattheyhadaterribleproblem—theirphosphatewasrunningout.Ninetypercentoftheirislandwasdestroyedandtheyhadnothing.By2000,Nauruwasfinanciallyruined.Expertssaythatitwouldtakeapproximately$433,600,000andmorethan20yearstorepairtheisland.Thiswillprobablyneverhappen.Whatmightbetheauthor’spurposeinwritingthetext? A．ToseekhelpforNauru’sproblem
B．Togiveawarningtoothercountries
C．Toshowtheimportanceofmoney
D．Totellaheartbreakingstoryofawa
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