Final answer:
A systems analyst is responsible for determining the computer processing needs of users by analyzing requirements and planning suitable IT solutions.
Step-by-step explanation:
The personnel responsible for determining the computer processing needs of the various users is C) The systems analyst. Systems analysts are involved with researching problems, planning solutions, and recommending software and systems to meet an organization's information technology needs. They liaise with users to understand their requirements, analyze existing systems for improvement, and work to ensure that the IT infrastructure supports the goals of the organization effectively.
Application programmers, computer operators, and systems programmers have different roles. Application programmers are responsible for writing software to meet specific needs, computer operators manage the day-to-day operations of computer systems, and systems programmers write and maintain system software that runs computers. Systems analysts, important personnel in the information technology field, bridge the gap between IT capabilities and business objectives.