How are Tanzu Kubernetes clusters upgraded?

How are Tanzu Kubernetes clusters upgraded?
A. Deploy a new cluster with upgraded Kubernetes release
B. Rolling upgrades
C. Clusters are only upgraded offline
D. In-place upgrade for each node

Correct Answer: B
Explanation/Reference:
Reference: https://docs.vmware.com/en/VMware-vSphere/7.0/vmware-vsphere-with-tanzu/GUID-DF2B3886-4BE0-4E88-B549-DC9C1C653FDB.html