单项选择题

Asystemisexperiencingnameresolutionissues.Theadministratorhasverifiedthat/etc/resolv.confissuitablyconfiguredusingcorrectsyntax.However，processesrunbynon-rootusersarefailingtoresolveanyhostnamestoIPaddresseswiththeerror’Noresponsefromserver’.Whichtoolwillhelptracethenslookupcommandinanattempttoinvestigatetheproblem？（）
A.kdb
B.dbx
C.trace
D.truss

A.Theadministratorhasverifiedthat/etc/resolv.confissuitablyconfiguredusingcorrectsyntax.However，processesrunbynon-rootusersarefailingtoresolveanyhostnamestoIPaddresseswiththeerror’Noresponsefromserver’.Whichtoolwillhelptracethenslookupcommandinanattempttoinvestigatetheproblem？（）
A.kdb
B.dbx
C.trace
D.truss

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