An encryption scope provides a named encryption boundary for blobs and can use Microsoft-managed or customer-managed keys depending on configuration. The planned change refers to storage encryption, and the visible answer set points to a storage2-specific encryption configuration rather than vault purge protection or Azure RBAC. Account-level encryption keys affect the entire account; encryption scopes are the correct more granular storage encryption control. The important exam skill is separating data-plane access, management-plane administration, and network reachability. A storage, database, or firewall setting must be selected because it enforces the exact path requested in the scenario. Distractors often look plausible because they improve security generally, but they do not satisfy the protocol, scope, or automation requirement stated in the question. The result is a direct exam-style implementation choice: it changes the required security behavior without relying on unrelated monitoring, manual cleanup, or excessive privilege. Official Microsoft source/topic: SC-500 Study Guide > storage encryption; Microsoft Learn > Azure Storage encryption scopes.

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