Which of the following is classified as security cargo?

Cargo marked SECRET is classified as security cargo because it refers to sensitive information or materials that, if disclosed, could cause harm to national security. This classification is part of a structured system used to protect information, ensuring that access is restricted to individuals with the appropriate clearance level.

In contrast, while cargo marked CONFIDENTIAL and TOP SECRET also fall under security classifications, each has different levels of sensitivity and handling protocols. CONFIDENTIAL is a lower classification, while TOP SECRET is the highest, requiring stricter access controls. Cargo without a security marking is not considered security cargo as it does not contain sensitive information requiring special handling or protection.