Which of the following best describes business requirements?

Business requirements are fundamental aspects that guide the needs and objectives of an organization. Specifically, they outline the high-level needs of the business that drive projects and initiatives, providing clarity on what must be achieved to support the organization's goals. These requirements typically inform project stakeholders about the expectations and functionalities necessary to fulfill the organization's mission and vision.

When stating that the best answer is the one that describes specific directives guiding business decisions, it highlights the crucial role that these business requirements play in shaping decisions, project scopes, and strategies within an organization. They are pivotal in ensuring that any undertaken initiatives align with broader organizational goals and deliver meaningful outcomes.

While other options touch on relevant concepts, such as the rationale for organizational changes, the criteria for project success, and teamwork, they don't encapsulate the essence of what business requirements represent. Business requirements specifically center around directing and influencing business decisions, making option C the most fitting choice.