Which IKE identity does an IOS/IOS-XE headend expect to receive if an IPsec Cisco AnyConnect client uses default settings?

Which IKE identity does an IOS/IOS-XE headend expect to receive if an IPsec Cisco AnyConnect client uses default settings?
A. *$SecureMobilityClient$*
B. *$AnyConnectClient$*
C. *$RemoteAccessVpnClient$*
D. *$DfltlkeldentityS*