What classification level unsecured material can cause exceptionally grave damage to national security?

• A. Top Secret
• B. Secret
• C. Confidential
• D. Unclassified

Answer: (A)

Classification levels protect information based on how harmful its disclosure would be. The level assigned to information whose unauthorized release could cause exceptionally grave damage to national security is Top Secret. This designation carries the strictest safeguards: the most limited access, strict need-to-know controls, highly secure storage, and rigorous handling and transmission procedures. In practice, only a very small group with the highest clearances can access it, and additional protective measures may apply (such as specialized compartments).

Other levels exist for lesser degrees of damage: information that could cause grave damage fits a lower level, while material that could cause damage but not as severe as grave damage fits yet lower levels, and information that would not harm national security sits at Unclassified.