A member receives referral fees consideration from individuals outside the member's firm for the recommendation of a financial service. According to the Standards of Professional Conduct, before entry into any formal agreement for the service, the member is required to disclose to their employer, clients and prospective clients:

A. only the nature of the consideration.
B. only an estimated dollar value of the consideration.
C. both the nature and the estimated dollar value of the consideration.

简述SCTP协议的特点。