关键词：two or more parties/reach an agreement

Negotiation is a process in which two or more sides reach a mutually acceptable position. They start by defining their own objectives, understanding the needs and objectives of the other sides, and finding the best way to satisfy the needs of all sides. Strategic planning may involve negotiation if leaders must compromise on objectives and roles, but it is a planning process. Performance evaluation is a measurement of performance against defined standards. A manager and an employee may use negotiation to decide a personal development plan. A meeting of the minds refers to communication that results in understanding but does not necessarily require agreement.

题干中想要问的是两个或两个以上的各方共同努力想要就一个问题达成协议，这个行动的过程是什么？

首先Negotiation协商，即是两方或两方以上达到相互可以接受的约定的一个过程所以说A是正确答案；B选项的Strategic planning战略规划，是协商计划的一个过程；C选项的意见达成一致也是协商里面的一个目标；以及D选项，表现评估也是协商里面的一个程序。