Which of the following is true regarding configuration of clustering nodes?

Which of the following is true regarding configuration of clustering nodes?

A.
Cluster nodes do not have to run exactly the same version of CheckPoint package

B.
Each node must have exactly the same set of packages as all the other nodes

C.
Each cluster node must run exactly the same version of R71

D.
You must enable state synchronization

E.
You must install R71 as an enforcement module (only) on each node