Jane Mattock, CFA, senior vice president and head of the research department of H&V, Inc., a regional brokerage firm. In preparation for a long business trip, Mattock delegates his authority to Deion Miller, CFA. Which of the following is most accurate to comply with the Professional Conduct Standards（）

A. Mattock is required to advise his supervisor and his compliance department, in writing, of the delegation of his supervisory duties.

B. Mattock still has supervisory responsibility and must instruct Miller about methods to prevent and detect violations of applicable laws, rules, regulations, and the CFA Institute Code of Ethics and Standards of Professional Conduct.

C. Miller still has supervisory responsibility but need not instruct a charterholder like Miller about methods to prevent and detect violations of applicable laws, rules, regulations, and the CFA Institute Code of Ethics and Standards of Professional Conduct.

Ⅱ期内痔与Ⅲ期内痔的最主要区别是：

A．出血的多少

B．痔核的大小

C．痔核是否脱出

D．痔核可自行回纳

E．痔核脱出充血水肿