Final answer:
The correct answer is option (b), as it identifies that a flight crew member should not be required to act, nor volunteer to act, if they are suffering from, or likely to suffer from fatigue or any condition rendering them unfit for their duties. It highlights the importance of safety and fitness in aviation.
Step-by-step explanation:
The question pertains to the safety regulations and fitness of flight crew members in the aviation industry. Specifically, it deals with the stipulations that neither an operator of an airplane should require someone to act as a flight crew member, nor should a person act as one if they have any reason to believe that the individual is not fit to perform due to newness to the operator’s service, fatigue, or any other factor that could affect their performance. Therefore, the correct answer to the question would be option (b) is suffering or is likely to suffer from fatigue or unfit to perform properly the duties as a flight crew member. Flight crew members must be in a state that ensures they can perform their duties safely, which is why fatigue management and ensuring they are not new to the service without proper acclimatization, are critical to maintaining airline safety.