Which of the following actions can lead to cross-contact with allergens?

The action that can lead to cross-contact with allergens is using the same cutting board for multiple food items without cleaning. When a cutting board is not cleaned between uses, any residue or traces of allergens from one food item can transfer to another food item, which is especially concerning for individuals with food allergies. This practice can result in allergic reactions if the second food item is consumed by someone who is sensitive or allergic to the first item.

In contrast, utilizing separate utensils for each ingredient, thoroughly cleaning surfaces before use, and clearly labeling food items are all practices that help prevent cross-contact and promote food safety. These measures minimize the risk of allergen transfer and help ensure that food preparation environments are safe for individuals with dietary restrictions.