简述扁钢、圆管、槽钢、薄板、深缝的锯割方法。

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.