Which of the following is a component of National Security Information?

All of the options listed are integral components of National Security Information, which encompasses various measures and processes designed to protect sensitive information related to national security.

Access control measures are crucial as they define who is authorized to access certain information, ensuring that only individuals with the appropriate security clearance can view or handle sensitive data. This helps to mitigate the risk of unauthorized access or potential leaks of classified information.

Threat assessment procedures are necessary to identify and evaluate potential risks to national security information. By systematically analyzing threats, organizations can implement strategies to safeguard information against espionage, attacks, or other risks that could compromise national security.

Record-keeping regulations play a vital role in maintaining the integrity and confidentiality of sensitive information. They establish guidelines for how national security information should be documented, stored, and disposed of, ensuring accountability and facilitating proper oversight.

Thus, the overarching nature of national security information includes access control measures, threat assessments, and record-keeping regulations, making the selection of "All of the above" as the correct answer comprehensive and accurate, as it acknowledges the importance of each individual component in the broader context of national security.