Which statement is true about IKEv2 preshared key authentication between two peers? 

Answer options:

A. IKEv2 allows usage of different preshared keys for local and remote authentication.
B. IKEv2 allows usage of only one preshared key.
C. IKEv2 allows usage of only one preshared key and only in hub-and-spoke topology.
D. IKEv2 does not allow usage of preshared key authentication.

A