Explanation
In order to use the matrix documentation approach to model requirements, the identified requirements must have the uniform structure of their characteristics and identification.
Answer A is incorrect. The requirements do no need to have opposing values to use the matrix documentation
approach.
Answer B is incorrect. While this choice is tempting, the best answer is the uniform structure.
Answer D is incorrect. This isn't a valid answer, as requirements don't need rated goals.

Explanation/Reference:
Obtaining the human resources needed to complete the project comes under the Acquire Project Team process, which is a part of Project Human Resource Management Knowledge Area. Project Human Resource Management is one of the nine Knowledge Area groups. It includes the processes that organize and manage the project team. The project team is comprised of the people who have assigned roles and responsibilities for completing the project. Project Human Resource Management is a group of the following processes required to make the most effective use of the people involved with the project.
Develop Human Resource Plan
Acquire Project Team
Develop Project Team
Manage Project Team
The project management team is a subset of the project team and is responsible for project management activities such as planning, controlling, and closing. This group can be called the core, executive, or leadership team. These processes interact with each other and with the processes in the other Knowledge Areas as well.

Level of abstraction describes the breadth and depth of the information being provided. Representations of information may range from highly conceptual or summarized to very detailed. In determining how much detail each stakeholder may require as the initiative evolves, consideration is given to the needs of the stakeholders, the complexity of what is being explained, and the importance of the change. Rather than present the same information to all stakeholders, business analysts should present information with appropriate breadth and level of detail based on each stakeholder's role. Business analysis information regarding a topic of significant importance or high level of risk is frequently represented in greater detail.