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What type of access policy should be created to ensure archived data in Azure Blob storage cannot be deleted for five years?
Legal hold access policy
Snapshot policy
Access control list (ACL)
Retention policy
The correct answer is: Legal hold access policy
An effective way to ensure that archived data in Azure Blob storage remains protected from deletion for a specified period, such as five years, is by implementing a legal hold access policy. This type of policy is specifically designed to retain data without the risk of accidental deletion or modification, ensuring compliance with legal or regulatory requirements. When a legal hold is in place, all operations that would typically allow the data to be deleted or modified are blocked. This makes it particularly suitable for organizations that must retain data for extended periods due to legal or compliance reasons. The legal hold persists across various types of operations, ensuring that the data remains intact until the hold is explicitly removed, which can only be done through a governed process. The other options, while they serve important functions, do not effectively fulfill the requirement for long-term protection of data against deletion over the specified time frame. For instance, a retention policy is meant to automate the deletion of data after a given time, whereas a snapshot policy primarily focuses on creating a point-in-time backup of the blobs. Access control lists (ACLs) are used to manage permissions at a more granular level, but they do not enforce retention or prevent deletion over a long term. Thus, the legal hold access policy is the most appropriate