What is essential for ensuring that requirements support one another in achieving overall objectives?

The correct choice in this context highlights the importance of aligning requirements with overall business objectives. When requirements are crafted with clear business objectives in mind, they work cohesively towards common goals. This alignment ensures that each requirement reinforces others, preventing conflicts and ensuring a unified approach in achieving the organization's aspirations. By focusing on business objectives, stakeholders can prioritize and evaluate requirements based on their contribution to desired outcomes, leading to more effective decision-making and resource allocation.

In contrast, while the other choices such as requirements integration and alignment might address aspects of how requirements can work together, they do not capture the foundational importance of linking requirements to business objectives. Performance evaluation, while important in assessing how well requirements meet their intended goals, does not inherently ensure that all requirements are harmonized or aligned with the broader objectives.