Which of the following is a category of information listed for classification under Executive Order 13526?

Classification under Executive Order 13526 involves protecting national security information that requires a specific level of safeguarding. One key category under this order includes military operations. Information related to military operations is crucial as it can impact national defense strategies, troop movements, and overall military readiness. Protecting this information from unauthorized disclosure is essential to maintaining operational security and safeguarding the interests of the nation.

In contrast, the other listed categories do not fall under the realm of classified information as directed by the Executive Order. Historical records are often preserved for the sake of public knowledge and may not necessarily be classified. Consumer information pertains to private data about individuals and is usually managed through privacy laws rather than classified status. Publicly available data does not meet the criteria for classification as it can be freely accessed by the general public. Thus, military operations distinctly align with the types of information that are eligible for classification under the executive order.