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