Atechniciansupportsusersinaclient\/serverenvironment.Ausersuddenlycannotaccessany networkresources.Theusertriedtologontoaknownworkingcomputerbutwasunsuccessful.WhichofthefollowingshouldthetechniciancheckFIRST？（）
A.Checkiftheuseraccountislocked
B.Checkgrouppolicy
C.Checkthedriveforfragmentation
D.CheckNTFSpermissions
参考答案：A
