What is opsec (select all that apply)?

1. OPSEC stands for Operational Security.
2. It is a process that identifies critical information to determine if friendly actions can be observed by adversaries, assists in developing countermeasures to protect sensitive information.
3. OPSEC helps to protect sensitive or classified information from being compromised.
4. It involves identifying potential threats and vulnerabilities that could be exploited by adversaries.
5. OPSEC measures can include limiting the amount of information shared publicly, using encryption for communication, and implementing strict access controls.
6. It is commonly used by military, government agencies, and corporations to protect their operations and information.