Which step must a food handler take when helping a customer place an allergen-special order? A. Include the customer's contact information on the order ticket. B. Request staff to avoid using any of the Big Eight allergens in the kitchen. C. Ask questions to determine if the customer has a food allergy or a food sensitivity. D. Recommend menu items without the ingredient the customer is allergic to. E. Request the customer to sign a food allergy waiver before ordering food.