The answer is option C: Use ground-fault circuit interrupters, and inspect extensions cords and portable tools.
Inspecting the extension cords needs to be done constantly, or there can be abrasions or cuts that won't be noticed. Option B remains one of the most important ways to be safe around electricity. Always wear non-conductive safety equipment, such as safety goggles or rubber gloves. You should also avoid touching exposed metal. Option C indicates one of the two ways that do not help you stay safe around electricity. A ground fault interrupter only works if there is a short circuit or a huge amount of energy going through that point and thus, will not effectively protect you from possible incidents with electricity.
