根据下列文章，回答31～35题。
Duringthepastgeneration，theAmericanmiddle-classfamilythatoncecouldcountonhardworkandfairplaytokeepitselffinanciallysecurehasbeentr ansformedbyeconomicriskandnewrealities.Nowapinkslip，abaddiagnosis.oradisappearingspousecanreduceafamilyfromsolidlymiddleclasstonewlypoorinafewmonths.
Injustonegeneration，millionsofmothershavegonetowork，tr ansformingbasicfamilyeconomics.Scholars，policymakers，andcriticsofallstr ipeshavedebatedthesocialimplicationsofthesechanges，butfewhavelookedatthesideeffectfamilyriskhasrisenaswell.Today'sfamilieshavebudgetedtothelimitsoftheirnewtwo-paycheckstatus.Asaresulttheyhavelosttheparachutetheyoncehadintimesoffinancialsetback-aback-upearner（usuallyMom）whocouldgointotheworkforceiftheprimaryearnergotlaidofforfellsick.This“added-workereffect”couldsupportthesafetynetofferedbyunemploymentinsuranceordisabilityinsurancetohelpfamiliesweatherbadtimes.Buttoday，adisruptiontofamilyfortunescannotlongerbemadeupwithextr aincomefromanotherwise-stay-at-homepartner.
Duringthesameperiod，familieshavebeenaskedtoabsorbmuchmoreriskintheirretirementincome.Steelworkers，airlineemployees，andnowthoseintheautoindustr yarejoiningmillionsoffamilieswhomustworryaboutinterestr ates，stockmarketfluctuation，andtheharshrealitythattheymayoutlivetheirretirementmoney.Formuchofthepastyear.PresidentBushcampaignedtomoveSocialSecuritytoasavings-accountmodel，withretireestr adingmuchoralloftheirguaranteedpaymentsforpaymentsdependingoninvestmentr eturns.Foryoungerfamilies，thepictureisnotanybetter.Boththeabsolutecostofhealthcareandtheshareofitbornebyfamilieshaverisen-andnewlyfashionablehealth-savingsplansarespreadingfromlegislativehallstoWal-Martworkers，withmuchhigherdeductiblesandalargenewdoesofinvestmentr iskforfamilies‘futurehealthcare.Evendemographicsareworkingagainstthemiddleclassfamily，astheoddsofhavingaweakelderlyparent-andalltheattendantneedforphysicalandfinancialassistancehavejumpedeightfoldinjustonegeneration.
Fromthemiddle-classfamilyperspective，muchofthis，understandably，looksfarlesslikeanopportunitytoexercisemorefinancialresponsibility，andagooddealmorelikeafrighteningaccelerationofthewholesaleshiftoffinancialriskontotheiralreadyoverburdenedshoulders.Thefinancialfallouthasbegun，andthepoliticalfalloutmaynotbefarbehind.
第31题Today'sdouble-incomefamiliesareatgreaterfinancialriskinthat
A．thesafetynettheyusedtoenjoyhasdisappeared.
B．theirchancesofbeinglaidoffhavegreatlyincreased.
C．theyaremorevulnerabletochangesinfamilyeconomics.
D．theyaredeprivedofunemploymentordisabilityinsurance.
正确答案：C
