Rejesh Sekar, CFA, is a successful hedge fund manager and uses fundamental and technical statistical models to select stocks for his fund. When Bill Mandeville, a client asks him about the indicators underlying his models, Sekar tells Mandeville that his method is confidential but is proven to provide future returns similar to its p past performance. Sekar has most likely violated the Standards of Professional Conduct:（）
A. only relating to performance presentation.
B. only relating to communication with clients and prospective clients.
C. both relating to performance presentation and communication with clients and prospective clients.