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Hagrid
The correct answer for this question is this one: "b. class e."

The class of hard hats that does not protect you from electrical shock is Class E. This class is somewhat unstable and not really safe.
Hope this helps answer your question and have a nice day ahead. 

Answer:

a. class c

Explanation:

The hard hats are certified by the American National Standards Institute (ANSI). The hard hats have to meet the ANSI Z89.1 specifications. The standard specifies the hard hat types and classes, performance requirements and design for various conditions and testing. There are three hard hat classes for electric shock protection

Class G 2200 Volts protection

Class E 20,000 Volts protection.

Class C which do not offer protection from electric shock

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