What is OPSEC?

What is OPSEC?
A . OPSEC, (operational security) is a simple and systematic method of employing safeguards to protect critical information. It responds to the fact that small bits of information from different sources can be combined to reveal sensitive information
B. OPSEC, (operational security) is a simple and systematic method of employing safeguards to protect personal identifiable information. It responds to the fact that small bits of information from different sources can be combined to reveal sensitive information
C. OPSEC, (operational security) is a simple and systematic method of employing safeguards to protect business specific information that relates directly to the company. It responds to the fact that small bits of information from different sources can be combined to reveal sensitive information
D. OPSEC, (operational security) is a simple and systematic method of employing safeguards to protect critical government information. It specifically refers to national level information and intelligence and how it should be stored, shared and destroyed

Answer: A