The correct answer is C: Error: could | Correction: should.
In legal/formal documents, "should not be construed" is the standard expression, as it conveys obligation/prohibition, not possibility.
"Could" expresses possibility, while "should" expresses obligation or a directive — appropriate for Terms and Conditions documents that instruct users on how content must not be used. Examiners look for awareness of formal/legal register in such error-correction questions.