Answer: B. Job performance
Step-by-step explanation:
Job performance simply means the level to which the job responsibilities of an employee is being successfully fulfilled by the person.
Since the factors being evaluated are the amount of time that the trainer spends with each of his trainees, the coverage of key points, his success rate in turning out trained salespeople within the amount of time allotted etc, then it can be infer that his job performance is being evaluated.