What should commanders prioritize when assessing courses of action?

When assessing courses of action, commanders should prioritize alignment with the overall mission objectives because this ensures that any chosen course effectively contributes to achieving the broader goals of the operation. The alignment with mission objectives provides a framework for gauging the suitability, feasibility, and acceptability of each proposed course. This strategic focus helps in evaluating whether the actions proposed will effectively address the situation at hand and lead to mission success.

Prioritizing alignment with mission objectives also aids in resource allocation and decision-making, as it highlights the actions that are most likely to fulfill the commander's intent. Additionally, it fosters unity of effort among subordinates, ensuring that everyone is working towards the same end goal.

While the completeness of the mission statement, ease of execution, and effectiveness of communication are important considerations in the planning process, they do not supersede the necessity of ensuring that all actions relate directly to and support the mission objectives. The other choices lack the essential focus on the overarching goals that must guide any effective military operation.