题目内容：
根据以下材料，回答题InspiteofallstoriesofprosperityintheUnitesStates,notonlydoespovertyexistthere,butcrimesofvarioustypeshavebeenincreasingatanalarmingrate.Mostactsofviolencewerecom-mittedbyyoungpeople.57%ofthecriminalsarrestedin1979wereyouthsbelow25ofage.
Everyoneagreesthatcrimeispartlyaresultofbadmaterialconditions:poverty,lackofedu-cation,livingwithinasettledhome,beingparentless,sufferingsfromotherkindsofmisfortune,etc.
Therearealsootherfactorsthanmaterialconditionswhichareresponsibleforthesharpin-creaseofcrimerate.Inthefirstplace,somestatelawsprovideadeathpenaltybutsomenot.Sec-ondly,theConstitutionallowseverycitizentocan'yweaponsforhisownprotection.Itisthereforepossibleandeasyforanyoneinthecountrytogetagun.Finally,therehasbeentoomuchshownonTVandtoomuchreportedinnewspaperofallkindsofcrime,thedetailsofwhicharesoaccu-ratelydescribedthatevenchildrenknowhowtoduplicatewhattheyhaveseenorread.Allthesehaveresultedinahighfrequencyofcrimescommittedbothbyprofessionalcriminalsandbynon-professionalonesinmurder,drugsmuggling,robbery,etc.
Theauthorintendstotellthereadersthat______ A．theUnitedStatesisawealthycountryalthoughpovertyandcrimeexistthere
B．crimehasbecomeaseriousproblemintheUnitedStates,althoughitissaidtobeapros-perousone
C．despitethefactthatcrimeshavebeenincreasingrapidlyintheUnitedStates,itisacoun-tryofprosperity
D．inspiteofstoriesaboutpovertyandcrimeintheUnitedStates,itisprosperingatanincreasingrate
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