Final answer:
The student is asking for the specific CLI flag to apply a cluster bundle without validation. In general, flags like --force or --skip-validation are used, but must be employed with caution.
Step-by-step explanation:
The question asks about a specific flag to add to a Command Line Interface (CLI) command which is used to apply a cluster bundle without performing validation. This task is typically related to the administration of a cluster managed by a software system where configurations and updates can be packaged into a 'bundle' and applied to the cluster. To apply a cluster bundle without validating it, typically a flag such as --force or --skip-validation would be used. It's important to note that using such a flag should be done with caution, as it bypasses important checks that may prevent configuration errors or inconsistencies within the cluster.