Final answer:
The actual mission of the agency is the first consideration in planning, as it requires an understanding of agency values, objectives, goals, policies, and rules.
Step-by-step explanation:
The subject of this question is Business and it is of College level. The answer to the question is A. mission. The question is discussing the importance of considering the actual mission of the agency in the planning process. Understanding the agency's values, objectives, goals, policies, and rules plays a crucial role in achieving this understanding and agreement.