Which of the following are types of nuclear weapons security measures?

The correct answer identifies critical components of nuclear weapons security measures, emphasizing the importance of protecting nuclear assets and ensuring their safe management.

Physical security encompasses protective measures designed to physically safeguard nuclear materials and facilities from unauthorized access or potential threats. This includes surveillance systems, barriers, and armed security personnel.

Personnel reliability programs focus on ensuring that individuals who have access to nuclear materials are trustworthy and capable of performing their duties responsibly. This may involve background checks, psychological evaluations, and ongoing monitoring to prevent insider threats.

Information security protects sensitive information related to nuclear weapons, including technical data and operational procedures. Secure communication channels and restricted access to information help safeguard against espionage or unauthorized disclosure.

Each of these components plays a crucial role in maintaining the integrity and safety of nuclear weapons, making them essential measures within nuclear security protocols.

In contrast, the other options may contain elements important for broader safety and operational contexts, but they do not directly address the specialized measures required specifically for nuclear weapons security.