What is the function of the classification marking "Secret"?

The function of the classification marking "Secret" is to indicate that the information requires a certain level of security clearance to access it. This classification level means that unauthorized disclosure of the information could cause serious damage to national security. Individuals must have specific clearance and a need-to-know to view such classified material.

In contrast, the other options do not align with the purpose of the "Secret" marking. Information marked as "Secret" is not intended for public distribution, nor does it suggest a lack of sensitivity. Additionally, the marking does not restrict access solely to government records; it applies more broadly to ensure that only appropriately cleared individuals can handle such sensitive information.