Final answer:
The best snack option for an adult on prolonged bed rest is fresh fruit due to its nutritional content, including vitamins, minerals, and fiber.
Step-by-step explanation:
In considering the best snack for an adult client on prolonged bed rest, the options provided are popcorn, fresh fruit, cheese and crackers, and potato chips. The optimal choice among these would be b) Fresh fruit because fresh fruit offers essential vitamins, minerals, and dietary fiber, which are crucial for maintaining good health, especially for someone who may be less active due to bed rest. Popcorn and potato chips can be high in sodium and calories without providing as much nutritional value, while cheese and crackers do provide some protein and calcium but lack the vitamins and fiber found in fresh fruit.