What should be confirmed about the skin before applying electrodes?

The correct answer pertains to the preparation of the skin before electrode application, which is crucial for ensuring effective electrical conductivity and enhancing the treatment's efficacy. Confirming that the skin is moistened is vital because moisture helps improve the conductivity of the electrodes. Dry skin can lead to poor electrical connection, which can produce less effective results or even skin irritation. It enhances the transfer of electrical impulses, ensuring that the treatment is both safe and effective.

While other factors like the skin's temperature or condition, such as being dry or exfoliated, are relevant to the overall skin care process, they do not address the specific requirements for electrode application. Moistening the skin directly supports optimal electrode function, making it the essential preparatory step.