Sub-contractorsshouldobeythecontractorininformationsystemproject.Whencensoringsub-contractors,thesupervisormostlyconcernsabout__

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问题 Sub-contractorsshouldobeythecontractorininformationsystemproject.Whencensoringsub-contractors,thesupervisormostlyconcernsabout______.

选项 A、Amountofsubcontract
B、qualificationsandabilitiesofsub-contractors
C、responsibilitiesandobligationsofsub-contractors
D、thecontentsofthesubcontract