According to the Professional Conduct Standards relating to referral fees, any compensation, consideration, or benefit paid to members for the recommendation of products or services are required to be disclosed:（）

A. only to current and potential clients, as appropriate.

B. only to their employer and current clients, as appropriate.

C. to both current and potential clients and their employer, as appropriate.

列有关细胞分化的叙述，正确的是（）

A.红细胞的形成与基因表达有关而与细胞分化无关

B.细胞的分化是基因选择性表达的结果，与相关基因的表达有关

C.胡萝卜叶肉细胞脱分化形成愈伤组织后不具全能性

D.癌细胞的产生与细胞的畸形分化无直接关系