Regardingsecuretunnel(st)interfaces,whichstatementistrue?()
A.Youcannotassignstinterfacestoasecurityzone.
B.YoucannotapplystaticNATonanstinterfacelogicalunit.
C.stinterfacesareoptionalwhenconfiguringaroute-basedVPN
D.Astaticroutecanreferencethestinterfacelogicalunitasthenext-hop