Which level is associated with information that could cause serious damage to national security?

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

Answer: (A)

Classification levels describe how sensitive information is and how it must be protected. The phrase that implies a level whose disclosure could cause serious damage to national security matches the level called Secret. This sits above Confidential (which could cause damage) and below Top Secret (which could cause exceptionally grave damage). So, Secret is the threshold associated with serious damage, making it the best answer. Understanding this scale also helps you remember that Top Secret requires even stricter controls, reflecting its potential for exceptionally grave harm.