Tom Stafford, CFA, is a part of team within Appleton Investment Management (AIM) responsible for managing a pool of assets for Open Air Bank. AIM is recognized as a specialist in identifying investment opportunities in small-capitalization stocks. The firm's assets have grown rapidly in recent years, and to enhance liquidity, senior management recently made the decision to lift the maximum permissible market-cap ceiling from $ 500 million to $2 billion. At the same time, management changed the group responsible for selecting stocks to be added to the firm's "approved" list from individual portfolio managers to a committee consisting of the firm's chief investment officer and four senior portfolio managers. Has Stafford violated the Professional Conduct Standards relating to communication with clients and prospective clients if he doesn't notify his clients about the changes in the：（）
A.
B.
C.
参考答案：C
解析：
所列两项都属于重大的投资流程的改变，根据与客户及潜在客户沟通的专业行为标准，需要告知客户这两项变化。