You are adding nodes to an existing cluster.
In this scenario, which three statements are correct? (Choose three.)

A.
If you are adding a second node to a single-node cluster, the second node must have been installed, but the cluster network can be configured later.

B.
You must add a cluster switch for every two nodes.

C.
If you are adding nodes to a multiple-node cluster, more than half of the existing nodes in the cluster must be healthy.

D.
The switchless cluster functionality is supported only in a single or two-node cluster.

E.
If you are adding nodes to a two-node switchless cluster, you must have installed and configured the cluster management and interconnect switches before
adding additional nodes.

Explanation:
C: If you are adding nodes to a multiple-node cluster, more than half of the existing nodes in the cluster must be healthy (indicated by cluster show).

E: If you are adding nodes to a two-node switchless cluster, you must have installed and configured the cluster management and interconnect switches before
adding additional nodes. Incorrect: not A: If you are adding a second node to a single-node cluster, the second node must be installed, and the cluster network must
be configured. Not D: The switchless cluster functionality is supported only in a two-node cluster.

Adding nodes to the cluster
https://library.netapp.com/ecmdocs/ECMP1636037/html/GUID-B13FF812-785E-4E62-9914-30E7A8F51A4C.html