Final answer:
The term 'Mission-Critical Information System' best defines an information system that needs special attention because of its importance to an agency's mission, its high costs, or its significant role in administration.
Step-by-step explanation:
The correct answer to the question is D) Mission-Critical Information System. Such a system requires special management attention because of its essential role in the functioning of an agency. The term 'mission-critical' refers to any factor, system, or component that is essential to an organization's ability to perform its operational objectives. If a mission-critical system fails or is interrupted, the organization's operations may be severely impacted or even come to a halt, which could pose risks to the agency's core mission and objectives. Therefore, these systems often have higher levels of resilience and redundancy and may be subject to more rigorous security protocols to ensure their constant availability and integrity.