Which Actions Should Be Taken in a Load Balanced Cluster

Which actions should be taken in a load balanced cluster in order to protect the load balancer against outages?

A) Load balancers cannot be protected against outages which is why they should always be built on dedicated hardware.
B) No actions are necessary as a load balancer cannot become a single point of failure.
C) Two or more load balancers should be deployed as a cascade that passes packets from one to the other.
D) Two load balancers should be deployed as a failover cluster.
E) Load balancers are used for performance and scalability reasons only and cannot be used to archive high availability clusters.