Final answer:
Personnel performing work affecting product quality must be competent on the basis of experience, education, training, and medical fitness.
Step-by-step explanation:
The correct answer is a) Experience, education, training, and medical fitness.
When personnel are performing work that affects product quality, it is important that they have the necessary competencies. This includes having the right experience, which allows them to have a good understanding of the job requirements and potential challenges. Education is also important, as it provides individuals with the knowledge and theoretical understanding that is necessary for performing the work effectively. Training helps individuals develop specific skills and acquire practical knowledge related to their job tasks. Lastly, medical fitness ensures that personnel are physically and mentally capable of performing the work safely and effectively.