The issue is complaint governance. A written allegation of unsuitable advice and a request for compensation must be treated as a complaint, even if the planner believes the recommendation was defensible. The planner should preserve the communication, record the relevant facts, notify the appropriate supervisory channel, and follow the firm's complaint process. The file should contain the original KYC information, risk-tolerance evidence, fund recommendation rationale, disclosure documents, trade record, and subsequent communications. Option A is improper because compensation should not be promised before the complaint is reviewed under firm policy. Option B is dismissive; market loss alone may not prove unsuitability, but the complaint still requires a formal response. Option C is unacceptable and would create a serious recordkeeping and conduct breach. A professional process protects both parties: the client receives a fair review, and the planner demonstrates procedural discipline, supervision, and documentation. References/topics: complaint handling, suitability review, recordkeeping, regulatory compliance.