A regional insurance claims platform in Sacramento, California is protected by a web application firewall...

The correct answer is B. Transforming Query Structure to Evade Pattern-Based Inspection.

The scenario describes a pattern-based security control blocking conventional injection payloads. The tester then changes the request’s format and composition while preserving the intended database action. This is a classic SQL injection/WAF evasion concept: changing how the query looks so that the security control no longer matches the malicious pattern, while the backend database still interprets the request successfully.

CEH-aligned SQL injection material explains that signature-based detection compares input strings against known signatures and that attackers may evade these signatures through techniques such as inline comments, character encoding, string concatenation, obfuscated code, manipulating white spaces, hex encoding, and sophisticated matches .

Option A is incorrect because HTTP Parameter Fragmentation specifically splits payload components across parameters; the scenario does not describe fragmentation.

Option C is incorrect because no combined or integrated multi-method evasion is described.

Option D is incorrect because HTTP Parameter Pollution involves duplicate or conflicting parameters; the scenario does not describe overriding query parameters.

Therefore, the best answer is B. Transforming Query Structure to Evade Pattern-Based Inspection.