A cook prepares a dish for a guest with a wheat allergy. Which ingredient must be avoided because it contains wheat?

解析

Regular flour tortillas are made from wheat flour and must be avoided for a wheat-allergic guest, while corn tortillas, plain grilled chicken, and white rice are wheat-free. Managers should teach staff which menu items and substitutions are safe. Reading labels and recipes helps catch hidden wheat in breading, sauces, and thickeners too.