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Which is the most appropriate measure to reliably maintain an audit trail for the handling of design drawings?
①Rely only on each person's local PC logs.
②Periodically export audit logs manually and store them.
③Store logs in an overwritable general-purpose database.
④Reduce storage costs by storing logs long-term without encrypting them.
⑤Implement a system protected by centralized audit logs with tamper-prevention features and strict access controls.