A patient needs a diet to prevent the trigger of diarrhea. What substances and foods should be eliminated from the patient's diet?

The focus of this question is on identifying dietary substances that can trigger diarrhea in certain individuals. The correct choice highlights the importance of eliminating specific sugars and stimulants that are known to cause gastrointestinal distress.

Caffeine, for instance, is a known stimulant that can increase gut motility, leading to diarrhea in some people. Fructose, which is a type of sugar found in many fruits and processed foods, can also cause issues, particularly in those with fructose malabsorption. Lactose, found in dairy products, may lead to lactose intolerance symptoms, including diarrhea, in individuals who lack the enzyme needed to digest it. Sorbitol, a sugar alcohol often used as a sweetener in sugar-free products, can have a laxative effect and exacerbate diarrhea.

Thus, the elimination of these substances is crucial for managing and preventing diarrhea in susceptible patients, making this option the most appropriate response to the question.