Which of the following statements about St
题型：单项选择题
问题：
Which of the following statements about Standard Ⅵ (C), Referral Fees, is TRUE（）
A. Referral fees must be disclosed after proceeding with an agreement for service.
B. Referral fees may be disclosed before or after proceeding with an agreement for service.
C. Referral fees must be disclosed before proceeding with an agreement for service.