Which of the following is an example of a physical contaminant?

Giải thích

Physical contaminants are hard or soft foreign objects that can injure a guest: metal staples, glass, bone fragments, hair, fingernails, bandages, and bits of packaging. A metal staple from a produce box is a classic example, which is why deliveries are inspected and boxes are opened away from open food. Sanitizer residue left on a cutting board is chemical contamination, Salmonella on the shell of an egg is biological contamination, and peanut oil left in a deep fryer is allergen cross-contact.