The correct answer is D.

Loadbalancing node means f5 use ip address as it parameter, not the session or ect were the pool does.
Example :
Loadbalance type lease connection member.
Pool member has 2 connection ssh and http.
If your vs for http, lease connection will chose which server has lowest http connection.

If you use least connection node, f5 only care about the address parameter. F5 does care how mush ssh session and http session are.
The whole session will accumulate in address.