Which processes are required to run on each node for proper functionality?

For proper functionality within a Tableau Server environment, it is essential for each node in the cluster to run specific processes that collectively maintain the server's operational integrity and performance. The correct answer encompasses all the specified processes: Metrics Service, Cluster Controller, and Backup/Restore.

The Metrics Service is vital for monitoring performance metrics and system health. It collects and stores usage metrics that are crucial for analyzing the performance of Tableau Server and optimizing resource allocation.

The Cluster Controller handles the distribution of tasks and ensures that all nodes in the cluster communicate effectively. This process is central to managing load balancing and ensuring that resources are being utilized efficiently across the entire server architecture.

The Backup/Restore functionality is critical for data protection and recovery purposes. This process allows for the creation of backup copies of the server's data and configurations, ensuring that in the event of a failure or data loss, the system can be restored to a previous state, minimizing downtime and data loss.

Running all these processes on each node guarantees not only operational efficiency but also resilience and reliability across the Tableau Server installation. Therefore, selecting the option that includes all these processes highlights a comprehensive understanding of the necessary components for a fully functional Tableau Server environment.