Final answer:
If a Dynatrace Cluster node fails, the remaining nodes automatically redistribute the workload to ensure continuous system operation without significant performance impact.
Step-by-step explanation:
When a Dynatrace Cluster node fails, the correct response is (a) The remaining nodes redistribute the workload automatically. Dynatrace is designed for high availability and resiliency, so in the event of a node failure within a cluster, the system is engineered to automatically handle such situations without human intervention. The other nodes in the cluster recognize the failure of a peer and work together to redistribute the workload that was handled by the failed node. This process ensures that monitoring and performance data continues to be collected and analyzed, with minimal impact on the overall cluster performance.