An introducing broker-dealer is primarily responsible for customer-facing activities, which includes opening accounts, communicating with customers, and accepting customer orders. Introducing firms “introduce” the business to a clearing firm, which provides the back-office infrastructure. The clearing firm typically handles functions like trade confirmation processing, clearance and settlement mechanics, custody of customer securities and funds, margin processing, and issuance of account statements and confirmations. That division of responsibilities is why “accepting customer orders” is the best match for an introducing broker.

Choice B is generally associated with a clearing broker, not an introducing broker. Custody and safeguarding customer assets is a key clearing function, supported by recordkeeping, possession-or-control requirements, and operational systems that most introducing firms do not maintain independently. Choice C also aligns more with a clearing firm’s role, since “helping ensure trades are settled appropriately” describes the clearing/settlement process (e.g., reconciliation, delivery versus payment mechanics, coordination with clearing agencies). Introducing firms may interact with customers about trade status, but the operational responsibility for settlement is typically the clearing broker’s domain.

Choice D is incorrect because clearing brokers generally have higher net capital requirements than introducing brokers due to their greater financial and operational responsibilities (e.g., carrying customer accounts, maintaining custody, financing margin). Introducing brokers typically operate with lower net capital requirements relative to clearing firms because they outsource many back-office and custody functions through a fully disclosed or omnibus clearing arrangement.

This distinction fits the SIE focus on market participants and their roles, including broker-dealer business models (introducing vs. clearing) and how customer orders flow through the marketplace.