Q1 Single choice Flag The NIST framework 800-137 breaks down the concept of continuous monitoring into which system of tiers? A Tier 1 is information systems, Tier 2 is mission/business processes, and Tier 3 is the organization. B Tier 1 is the organization, Tier 2 is mission/business processes, and Tier 3 is information systems. C Tier 1 is information systems, Tier 2 is the organization, and Tier 3 is mission/business processes. D Tier 1 is the organization, Tier 2 is information systems, and Tier 3 is mission/business processes. Correct answer