Final answer:
For a healthier option, Paulo should choose a banana, which is a whole food with natural sugars and dietary fiber, as opposed to options with added sugars, unhealthy fats, or processed ingredients.
Step-by-step explanation:
The best choice for Paulo, who is seeking a healthier option before his flight, would be B. banana.
This option is nutrient-dense, providing essential vitamins and dietary fiber without added sugars or unhealthy fats.
In contrast, a nut-filled candy bar may contain healthy nuts, but it's likely high in added sugar and calories. Apple juice, while it comes from fruit, often contains concentrated fruit sugars and lacks the fiber found in whole fruit.
Lastly, a bacon biscuit generally includes processed meat and refined flour, which are not ideal for those looking to improve their diet.