What is a common allergen found in the cheddar bacon burger?

The presence of wheat in the cheddar bacon burger is significant due to the common use of hamburger buns, which are typically made from wheat flour. This makes wheat a potential allergen for individuals who have wheat allergies or gluten sensitivities. Wheat is one of the top allergens recognized in many food contexts, and awareness of it is crucial for anyone providing food service, as it can affect a considerable number of customers.

The other choices may not relate directly to this specific burger. Shellfish, nuts, and peanuts are common allergens in other dishes but are not typically associated with a standard cheddar bacon burger. Therefore, understanding the main ingredients used in a burger, particularly the bun, helps to identify wheat as the allergenic ingredient in this case.