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单项选择题

Thesalesreportneedstodisplaythesalespersonwiththehighestordertotal.Whichbuildreportbuildercomponentwouldyouusetocreateaplaceholdercolumntodisplaythevalue?()

A.Reportwizard.
B.Layoutmodel.
C.Datamodel.
D.Lifepreviewer.
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