Can they be members of a gateway cluster?

You have two Nokia Appliances one IP530 and one IP380. Both Appliances have IPSO 3.9 and VPN1 Pro NGX installed in a distributed deployment. Can they be members of a gateway cluster?

A.
No, because the Gateway versions must not be the same on both security gateways

B.
Yes, as long as they have the same IPSO version and the same VPN1 Pro version

C.
No, because members of a security gateway cluster must be installed as standalone deployments

D.
Yes, because both gateways are from Nokia, whether they have the same VPN1 PRO version or not

E.
No, because the appliances must be of the same model (Both should be IP530orIP380.)