Explanation: A data sanitization policy is a document that defines how a cloud service provider (CSP) will permanently delete or destroy any data that belongs to its clients after the termination of the contract or the deletion of the service. Data sanitization is a process that ensures that the data is not recoverable by any means, even by advanced forensic tools. Data sanitization is important for cloud security and privacy, as it prevents unauthorized access, disclosure, or misuse of the data by the CSP or any third parties. A data sanitization policy can help the CSP demonstrate its compliance with the data protection laws and regulations, such as the General Data Protection Regulation (GDPR) or the Health Insurance Portability and Accountability Act (HIPAA), that may apply to its clients’ data. A data sanitization policy can also help the CSP build trust and confidence with its clients, as it assures them that their data will be handled securely and responsibly, and that they will have full control and ownership of their data. Therefore, option D is the best explanation of why a cloud provider would establish and publish a format data sanitization policy for its clients. Option A is incorrect because it does not explain why a cloud provider would establish and publish a format data sanitization policy for its clients, but rather how the provider will cleanse any data being imported during a cloud migration. Data cleansing is a process that improves the quality and accuracy of the data by removing or correcting any errors, inconsistencies, or duplicates. Data cleansing is not the same as data sanitization, as it does not involve deleting or destroying the data. Option B is incorrect because it does not explain why a cloud provider would establish and publish a format data sanitization policy for its clients, but rather how the CSP will handle malware infections that may impact systems housing client data. Malware is a malicious software that can harm or compromise the systems or data of the CSP or its clients. Malware prevention and detection are important aspects of cloud security, but they are not the same as data sanitization, as they do not involve deleting or destroying the data. Option C is incorrect because it does not explain why a cloud provider would establish and publish a format data sanitization policy for its clients, but rather how the CSP will provide a value add for clients that will assist in cleansing records at no additional charge. Data cleansing, as explained above, is a process that improves the quality and accuracy of the data, not a process that deletes or destroys the data. Data cleansing may or may not be offered by the CSP as a value-added service, but it is not the same as data sanitization, which is a mandatory and essential service for cloud security and privacy. References: CompTIA Cloud Essentials+ CLO-002 Study Guide, Chapter 5: Cloud Security Principles, Section 5.2: Data Security Concepts, Page 1471 and Data sanitization for cloud storage | Infosec
