Final answer:
Providing complete information about menu ingredients and designating allergen-free areas is the most practical way to guard against allergic reactions in restaurant guests.
Step-by-step explanation:
The most practical way to guard against allergic reactions in restaurant guests is to provide complete information about the ingredients in the menu selections, and reveal ingredients that contain allergens upon request. This allows guests to make informed choices based on their specific allergies. Designating "allergen-free" areas of the kitchen and dining room can also help prevent cross-contamination and reduce the risk of allergic reactions. Maintaining liability insurance is important for restaurants in case of medical claims, but it is not a direct method of preventing allergic reactions.
Learn more about allergic reactions in restaurant guests