WhichthreesecurityconcernscanbeaddressedbyatunnelmodeIPsecVPNsecuredbyESP？（）

A.Markpermittedtrafficforfirewalluserauthentication.
B.MarkpermittedtrafficforSCREENoptions.
C.AssociatepermittedtrafficwithanIPsectunnel.
D.AssociatepermittedtrafficwithaNATrulE.
E.MarkpermittedtrafficforIDPprocessing.

A.dataintegrity
B.dataconfidentiality
C.dataauthentication
D.outerIPheaderconfidentiality
E.outerIPheaderauthentication