What is discouraged when posting on social media regarding sensitive information?

The option that highlights the importance of protecting classified information is correct because it emphasizes the critical responsibility of individuals, especially those in the military or similar organizations, to maintain the confidentiality and security of sensitive data. Sharing classified information on social media can lead to significant security breaches, compromising missions, endangering personnel, and undermining national security.

Engaging in discussions about strategic plans or operational details on social media is highly discouraged because these platforms are not secure, and such actions could provide adversaries with valuable insights. While sharing details about training and talking about public events might have varying degrees of risk, they do not carry the same level of potential harm as disclosing classified information. The emphasis on protection of classified information reflects a fundamental principle in maintaining operational security and ensuring that sensitive information remains confidential.