Which two items related to the private interconnect could have caused these issues?

You have recently completed building an 8-node 12cR1 RAC cluster, and you are now seeing a lot of
instability, congestion, and network packet losses in the network.
Which two items related to the private interconnect could have caused these issues?

A.
IP addresses allocated to the private interconnect have been specified in /etc/hosts.

B.
The connections between the duster nodes for both public and private interfaces are using the
same switch.

C.
All the private interfaces used for the interconnects are being configured in separate subnets.

D.
You have used crossover cables for the cluster interconnect.