Safeguarding information and the physical environment around C2 is essential to keep the command and control system trustworthy and usable. Information security protects the data and communications that C2 relies on—ensuring confidentiality so sensitive orders and intelligence aren’t exposed, integrity so messages can’t be tampered with, and availability so the C2 network and its feeds are accessible when needed. Physical security covers the facilities, hardware, and access around those systems—preventing tampering, theft, or damage to servers, networks, and supporting infrastructure, as well as safeguarding against environmental or supply-chain risks. Together, they preserve the reliability, timeliness, and accuracy of C2, which is critical for making sound decisions and maintaining command authority. The other options miss part of the picture: security isn’t merely an optional enhancement, nor is it limited to protecting physical assets alone. It isn’t about managing cyber warfare in isolation; it spans protecting data, networks, and the environments that host them, ensuring the entire C2 process remains secure and available to commanders.