Answer:
The correct answer to fill in the blank is: has trouble digesting food.
Explanation:
Cholecystokinin (commonly abbreviated as CCK) is a hormone produced in the gastrointestinal system with the function to stimulate the release of digestive enzymes from the pancreas and bile from the gallbladder in order to help with the digestion of fats and proteins.
If Amanda can't produce cholecystokinin, she will have trouble digesting her food.