Thinking the differences between gent functions and agent programs, select correct statements from following ones. 考虑智能体函数与智能体程序的差异，从下列陈述中选择正确的答案

A、An agent program implements an agent function一个智能体程序实现一个智能体函数;
B、An agent function implements an agent program.一个智能体函数实现一个智能体程序;
C、An agent program has no any relation with an agent function.智能体程序与智能体函数没有任何关系;
D、An agent program contains agent function. 智能体程序包含智能体函数