An introducing broker-dealer generally accepts customer orders and introduces those transactions to a clearing firm for processing, custody, clearance, settlement, and recordkeeping functions. Choice C is correct. Introducing firms commonly maintain the customer relationship, solicit and accept orders, make recommendations, and provide front-office brokerage services. They typically do not carry customer accounts, custody customer funds or securities, or directly clear trades with clearing agencies. Choice A describes a clearing function, not the usual role of an introducing firm. Choice B is generally performed by the carrying or clearing broker-dealer that holds customer assets. Choice D is also generally associated with the carrying broker-dealer, which prepares and sends official account statements and confirmations, although introducing firms may provide supplemental communications. The SIE outline identifies broker-dealers, including introducing, clearing, and prime brokers, under market participants and their roles. The exam distinction is operational: introducing broker-dealers interact with customers and accept orders, while clearing broker-dealers handle custody, clearance, settlement, statements, and back-office processing. Reference: Section 1.1.4 Market Participants and Their Roles; introducing and clearing broker-dealers.