Which two conditions are prerequisites for stateful failover for IPsec? (Choose two)

Which two conditions are prerequisites for stateful failover for IPsec? (Choose two)
A . Only the IKE configuration that is set up on the active device must be duplicated on the standby device; the IPsec configuration is copied automatically
B . The active and standby devices can run different versions of the Cisco IOS software but must be the same type of device.
C . The IPsec configuration that is set up on the active device must be duplicated on the standby device
D . Only the IPsec configuration that is set up on the active device must be duplicated on the standby device; the IKE configuration is copied automatically.
E . The active and standby devices must run the same version of the Cisco IOS software and must be the same type of device.

Answer: C E