Which of the following statements is true regarding the compensation of an unlicensed

Which of the following statements is true regarding the compensation of an unlicensed solicitor for referring a customer to an investment advisor? A. A referral fee cannot be paid to an unlicensed solicitor
B. A referral fee may be paid to an unlicensed solicitor only if there is a prior written agreement detailing the work to be performed in compensation to be paid
C. A fixed fee may be paid it to an unlicensed solicitor only if the investment advisor is a federal covered advisor
D. The referral fee can be paid as long as the amount is fair and reasonable