Final answer:
The correct answer to the student's question is D. Kickback arrangement, which refers to the unethical and often illegal practice of getting paid for referrals, violating RESPA regulations.
Step-by-step explanation:
The scenario described refers to a kickback arrangement. This is when a real estate salesperson is receiving a fee from a lender for referring buyers to them. While it might be a common practice, it is generally considered unethical and is illegal under the Real Estate Settlement Procedures Act (RESPA). Such actions can lead to conflicts of interest and a violation of the salesperson's duty to act in the best interests of their client.