Final answer:
Stud earrings, a ball cap, single-band wedding ring, plain thumb ring are acceptable while prepping food, while a diamond nose stud is not.
Explanation:
Stud earrings and a ball cap are acceptable to wear while prepping food as they are less likely to harbor bacteria compared to dangling earrings like small hoop earrings. Additionally, a single-band wedding ring and a plain thumb ring are suitable as they do not pose a significant contamination risk. However, a diamond nose stud should be avoided while prepping food due to the increased risk of contamination.
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