The correct answer is B . For an unresolved investment complaint, the principal independent escalation mechanism identified in CIRO's client-compensation framework is the Ombudsman for Banking Services and Investments (OBSI) . CIRO states that after a client receives the firm's substantive response and remains dissatisfied, the client may proceed directly to OBSI or consider other available legal or arbitration options. OBSI is an independent dispute-resolution service, and CIRO-regulated investment firms are required to participate in its process.

CIRO complaint-handling guidance also requires the Dealer's substantive response to explain the alternatives available when a client is dissatisfied. These include the ombudsman service, arbitration and litigation. CIRO specifically requires clients to be informed that OBSI becomes available upon receipt of the substantive response, or after the applicable complaint-processing period where a response has not been provided.

A is inappropriate as the ordinary next step because a compensation dispute does not automatically constitute a criminal matter. C is not the primary compensation route; securities regulators and CIRO may investigate regulatory misconduct but generally do not function as the client's damages tribunal. D may be legally possible in unusual circumstances but is not the standard escalation mechanism.

The official CIRE practice material states that OBSI becomes involved when the firm and client cannot resolve the complaint themselves .

Study Guide Reference: CIRE Element 4.2 — recourse for dissatisfied clients: OBSI, litigation and CIRO arbitration.

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