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A key requirement for determining essential functions includes:

  1. The number of employees trained to perform these functions

  2. The existence of a position to perform the function

  3. The overall benefits of performing non-essential tasks

  4. The flexibility of roles within the company

The correct answer is: The existence of a position to perform the function

The determination of essential functions within a job role fundamentally hinges on the existence of a position that specifically performs those functions. Essential functions are critical tasks that a job must entail and directly relate to the nature of the employment or role within an organization. If there is no designated position performing a function, it may indicate that the task is not fundamental to the job. Evaluating essential functions focuses on responsibilities that are intrinsic to the job and without which the job would not exist. Thus, the presence of a role distinctly tied to these functions is vital in affirming their essential nature.