Answer:
The correct answer is C. Long necklace.
Step-by-step explanation:
At the workplace, many items can pose a threat because they can make the escape difficult by grabbing the person in the threat area. So at the workplace where the risk is high like a forge, gas stations, etc the items that can make your escape difficult should be avoided.
In the given options long necklace might pose a threat to personal safety at the workplace because it can be made up of strong material which might not break easily so it can make the escape difficult of a person during escape if it gets stuck in something.
Therefore the correct answer is C. Long necklace.