An administrator has a VMware Tanzu Kubernetes Grid management cluster named tanzu-mc0l which needs to...

The tanzu mc upgrade command is used to upgrade a management cluster to a newer version of Tanzu Kubernetes Grid. The command requires the name of the management cluster as an argument, and optionally the version to upgrade to. For example, toupgrade the management cluster named tanzu-mc01 to version v1.4.0, the command would be:

tanzu mc upgrade tanzu-mc01 --version v1.4.0

The other options are incorrect because:

kubectl management-cluster upgrade is not a valid command. The kubectl command is used to interact with Kubernetes clusters, not to upgrade them.

tanzu config use-context tanzu-mc01-admin@tanzu-mc01 is a command to switch the current context to the admin context of the management cluster named tanzu-mc01. It does not upgrade the cluster.

kubectl tanzu-mc01 upgrade is not a valid command. The kubectl command does not accept a cluster name as an argument, and there is no upgrade subcommand.

References: VMware Tanzu for Kubernetes Operations Getting Started, Upgrading Management Clusters