OPSEC is designed to protect sensitive information from adversaries.

• A. OPSEC is not important during training.
• B. OPSEC prevents unauthorized physical access to facilities.
• C. OPSEC is designed to protect sensitive information from adversaries.
• D. OPSEC increases the time required for mission planning.

Answer: (C)

OPSEC is all about safeguarding information that could reveal intentions, capabilities, or operations to an adversary. The aim is to prevent sensitive details from leaking and being pieced together to threaten missions. That’s why the statement that OPSEC is designed to protect sensitive information from adversaries is the best fit. It’s not about stopping people from physically entering a building—that’s physical security—nor about whether OPSEC matters during training, since training is a time when preserving sensitive information remains essential. It also isn’t primarily about slowing down mission planning; OPSEC can add careful steps, but its core purpose is protecting information from those who might misuse it.