Which two network requirements must be met?

You are preparing for a Grid Infrastructure and Oracle Database (with the RAC option) installation.
Which two network requirements must be met?

A.
All IP addresses planned to be used for the public or the private network should be unused.

B.
All IP addresses for the public and the private network should be in the same subnet

C.
All IP addresses should be registered in DNS.

D.
The IP addresses for the SCAN-IPs (part of SCAN) need to be in the same subnet as the node
VIPs.

Explanation:
C: * On each node in the cluster, assign a public IP address with an associated
network name to one network adapter. The public name for each node should be registered with
your domain name system (DNS).
D: During installation a SCAN for the cluster is configured, which is a domain name that resolves

to all the SCAN addresses allocated for the cluster. The IP addresses used for the SCAN
addresses must be on the same subnet as the VIP addresses.
Note:
* To perform a typical installation, which does not use GNS. You must configure the following
addresses manually in your corporate DNS:
A public IP address for each node
A virtual IP address for each node
Three single client access name (SCAN) addresses for the cluster
Reference: Preparing Your Cluster, Preparing Your Cluster