计算机网络协议的语法规定了用户数据与控制信息的结构和 【3】 。

A. The chairman asked the board to prepare an outline for the development plan.
B. The chairman agreed in general with the development plan proposed by the board.
C. The chairman described what the company would do in the years to come.
D. The chairman decided to contend against the company’s development strategy.