Which options are recognized means to protect against electrical shock?

The recognized means to protect against electrical shock primarily involve materials and devices that can effectively insulate or interrupt electrical current before it can harm a person. Rubber insulating gloves are designed specifically for electrical work, providing a protective barrier between the user and live electrical components, thus reducing the risk of electrical shock. These gloves are tested to withstand certain voltage levels and must be maintained correctly to ensure their effectiveness.

Ground-fault circuit interrupters (GFCIs) are devices that detect imbalances in electrical current. They are designed to shut off the electrical circuit when a ground fault is detected, which typically occurs when electricity is flowing through an unintended path, such as through water or a person. This rapid response significantly reduces the risk of electric shock and is particularly important in wet or damp environments, such as bathrooms and kitchens, where the risk of shock is greater.

In contrast, cardboard does not provide any electrical insulation or protection against shock. It is a poor conductor but does not meet the safety standards required for electrical protection, as it cannot prevent electrical currents from passing through or interrupting them. Therefore, while rubber insulating gloves and GFCIs are proven safety devices against electrical shock, cardboard is not suitable for this purpose. Hence, the correct answer involves both the rubber