Which of the following practices should be included in a firm’s code of ethics（）
A. Providing the board with relevant corporate information in a timely manner and allowing board members or other insiders to purchase stock before shareholders can make purchases.
B. Neither providing the board with relevant corporate information in a timely manner or prohibiting board members or other insiders from purchasing stock before shareholders can make purchases.
C. Providing the board with relevant corporate information in a timely manner and prohibiting board members or other insiders from purchasing stock before shareholders can make purchases.
