Final answer:
The situation that would produce the largest degree of stomach fullness is distension of the stomach by an inflatable bag in combination with infusion of nutrients directly into the duodenum.
Step-by-step explanation:
The situation that would be expected to produce the largest degree of stomach fullness is option 5) distension of the stomach by an inflatable bag in combination with infusion of nutrients directly into the duodenum.
When the stomach is distended by an inflatable bag and nutrients are infused directly into the duodenum, the stomach will be stretched to its maximum capacity, causing a greater degree of stomach fullness compared to the other situations.
In contrast, the other options involve either small volumes of food, restricted movement of food, or removal of food from the digestive system before reaching the stomach, which would result in less stomach fullness.