OPSEC and COMSEC differ in that:

• A. OPSEC protects information and capabilities; COMSEC protects communications and cryptographic materials.
• B. OPSEC protects weapons systems; COMSEC protects troops.
• C. OPSEC handles logistics; COMSEC handles supply chains.
• D. OPSEC secures money; COMSEC secures food.

Answer: (A)

The main idea here is that Operational Security (OPSEC) and Communications Security (COMSEC) protect different parts of how a operation functions. OPSEC is about guarding information and the capabilities that could be inferred from that information. It focuses on identifying sensitive information—like plans, locations, timing, or methods—that, if revealed, could help an adversary undermine the operation. COMSEC, by contrast, is dedicated to securing the actual communications and the cryptographic materials that protect them, such as encryption keys and the devices used to encrypt and decrypt messages. If those cryptographic materials or the communications channels are compromised, the whole operation’s security is at risk. So, OPSEC aims to prevent leakage of information about capabilities and operations, while COMSEC aims to prevent interception or compromise of communications and the cryptographic tools that safeguard them. The other options describe roles that aren’t what OPSEC and COMSEC specifically cover, like protecting weapons or troops or handling unrelated areas such as logistics versus supply chains or money versus food.