An IS auditor is reviewing an organization's controls over email encryption. The company's policy states that all sent email must be encrypted to protect the confidentiality of the message because the organization shares nonpublic information through email. To ensure that personnel are complying with the policy, an IS auditor must be sure the message is:Select an answer:A.encrypted with the sender's private key and decrypted with the sender's public key.B. encrypted with the recipient's private key and decrypted with the sender's private key.C. encrypted with the sender's private key and decrypted with the recipient's private key.D. encrypted with the recipient's public key and decrypted with the recipient's private key.