Which piece of jewelry is a food handler generally permitted to wear while preparing food?

解析

While preparing food, a food handler may wear a plain band ring (such as a wedding band) with no stones, but must remove watches, bracelets, and other rings, because jewelry can harbor pathogens, fall into food, or catch on equipment. Stone settings and charm links create crevices that hands cannot be washed clean around, and a watch band traps moisture and soil against the wrist. A plain smooth band is the only commonly allowed item.