When combined, would BEST mitigate this risk?

A security manager recently categorized an information system. During the categorization effort, the manager determined the loss of integrity of a specific information type would impact business significantly. Based on this, the security manager recommends the implementation of several solutions. Which of the following, when combined, would BEST mitigate this risk? (Select TWO.)
A. Access control
B. Whitelisting
C. Signing
D. Validation
E. Boot attestation

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