Final answer:
The function that is not one of the key OCS considerations is cybersecurity.
Step-by-step explanation:
The key OCS considerations refer to the factors that are important to consider when planning and implementing an Operational Contract Support (OCS) strategy. OCS is a part of military operations that involves contracting for supplies, services, and support to ensure operational success. The function that is NOT one of the key OCS considerations is d) Cybersecurity. While cybersecurity is important in any military operation, it is not specifically mentioned as one of the key considerations in OCS.