Which of the following is least likely to be a requirement for a firm claiming compliance with Global Investment Performance Standards (GIPS)（）

A. List discontinued composites for at least five years.

B. Comply with all requirements and be aware of updates and guidance statements.

C. Provide a compliant presentation only to prospects who request one.

合成催化剂的还原是从颗粒外表面开始逐步向内表面深入的，水汽浓度保持较低，有利于催化剂的还原。