AnswerA
ExplanationIdentify the managed cluster:
oc get managedcluster
If required in your environment, remove dependent placements/policies/apps targeting it (exam often expects you to check ''why deletion stuck'').
Delete managed cluster:
oc delete managedcluster cluster-dev
Watch finalizers and cleanup:
oc get managedcluster cluster-dev -o yaml | grep finalizers -n
Why this matters:
Proper lifecycle operations (import/manage/detach) is core EX432/EX480 scope.