A closed-toe footwear, safety visibility vest and a driver's license must be worn/ carried at all times.
Although part of your question seems to be missing, you might be referring to this full question:
Which Personal Protective Equipment (PPE) and essential paperwork must be worn/carried at all times (select all that apply)
Closed-Toe footwear
Safety visibility vest
Driver's license
Medical certificate (for DOT drivers)
Personal Protective Equipment or PPEs are the protective suits worn to prevent a person from being infected by a dangerous disease or harmful chemicals. These kits are worn by medical workers as well as anyone dealing with hazardous chemicals.
When dealing with any hazardous chemical or disease, it is necessary and safe for the person to wear closed-toe footwear, a safety visibility vest, and also carry a driver's license for any identification purposes. Thus, the correct answers are the first, second, and third options.
Learn more about PPE here:
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