Which of the following is a common allergen in Zaxby's menu items?

Dairy is a common allergen found in many of Zaxby's menu items, particularly in their sauces, dressings, and some sides like cheesy options. Many people have allergies or intolerances to dairy products, making it crucial for restaurants to inform customers about which dishes contain dairy. This knowledge helps ensure that patrons with dairy allergies can make safe choices when ordering.

While the other options such as rice, chicken, and tomatoes can cause allergies for some individuals, dairy is recognized as a more prevalent allergen within the context of Zaxby's offerings.