单项选择题

A.Duringthisphase,theanalystmustbecomefullyawareofthe(2)andmustdevelopenoughknowledgeaboutthe(3)andtheexistingsystemstoenableaneffectivesolutiontobeproposedandimplemented.Besidesthe(4)forprocessanddataofcurrentsystem,thedeliverablefromthisphasealsoincludesthe(5)fortheproposedsystem.
空白(4)处填()
A.logicalmodels
B.physicalmodels
C.designmodels
D.implementationmodels