Thepurposeofthesystemsanalysisphaseistobuildalogicalmodelofthenewsystem.Thefirststepis(71)，whereyouinvestigatebusinessprocessesanddocumentwhatthenewsystemmustdotosatisfyusers.Thisstepcontinuestheinvestigationthatbeganduringthe(72).Youusethefact-findingresultstobuildbusinessmodels，dataandprocessmodels，andobjectmodels.Thedeliverableforthesystemsanalysisphaseisthe(73)，whichdescribesmanagementanduserrequirements，costsandbenefits，andoutlinesalternativedevelopmentstrategies.Thepurposeofthesystemsdesignphaseistocreateaphysicalmodelthatwillsatisfyalldocumentedrequirementsforthesystem.Duringthesystemsdesignphase，youneedtodeterminethe(74)，whichprogrammerswillusetotransformthelogicaldesignintoprogrammodulesandcode.Thedeliverableforthisphaseisthe(75)，whichispresentedtomanagementandusersforreviewandapproval.
A.system logical modeling
B.use case modeling
C.requirements modeling
D.application modeling
正确答案是A