问答题
WhichthreearecomponentsoftheCiscoSMARTnetservice?()
A.NBDcallbackfromspecializedengineersduringregularbusinesshours
B.supportforeveryCiscoproduct
C.supportforlow-endproductsonly
D.casesopenedviae-mailortelephoneatanytime
E.advancedreplacementonthenextbusinessday
F.immediatesupportfromtheCiscoTACengineers