Final answer:
The segregation of duties between technical services and data center is generally seen as the least important from a security of resources standpoint in operations system control, as it is less directly involved with sensitive operations or data.
Step-by-step explanation:
From the standpoint of achieving the operations system control goal of the security of resources, the segregation of duties between technical services and data center is generally considered the least important. Segregation of duties is critical in a computing environment to ensure that no single individual has the ability to control all aspects of a transaction or operation, thereby reducing the risk of errors or fraud. The other listed segregations are more critical because they involve direct interaction with the system's software (systems programming and computer operations), data integrity (data control and preparation personnel), and integrity of program development and execution (systems development and computer operators).
The segregation between technical services and data center typically deals with less direct interaction with critical systems and data, and instead focuses on the maintenance and support aspects of the technology infrastructure. While it's important for overall operations, in the context of the security of resources, this segregation is not usually exposed to sensitive operations or data that could be easily compromised in the way that the roles involving direct handling of data or software might be.