which two cases must you configure the GNS?

In advanced Grid Infrastructure Installation, you can optionally configure Grid Naming Service (GNS).
In which two cases must you configure the GNS?

A.
You conjured a dedicated network for Automatic Storage Management (ASM)

B.
You deeded to configure a Flex Cluster.

C.
You decided to configure a Standard Cluster.

D.
You decided to use IPv6 addresses in client connections.

E.
You use Dynamic Host Configuration Protocol (DHCP) to assign IP addresses to duster nodes.