Final answer:
A rationale is the correct statement that outlines the reasoning for including a policy and procedure, explaining the need and intended goals for its inclusion.
Step-by-step explanation:
A rationale is a brief statement that outlines the reason for including a policy and procedure in a proposal or any written document. Its purpose is to explain the necessity and the goals behind the policy, ensuring the audience understands the context and the expected outcomes.
An executive summary might summarize the issue and recommended solution, while the mission statement broadly outlines an organization's purpose, and the protocol overview could provide a detailed description of procedures to follow. However, the rationale specifically addresses the why behind a policy's inclusion, making Option 3 (C) Rationale the correct answer to the question.