What Can Be Done Clinically to Decrease Impedance Between the Electrode

What can be done clinically to decrease impedance between the electrode and the skin?

A) Use smaller electrodes to disperse the current over a smaller area.
B) Use electrodes with gel or adhesive conductive agents.
C) Apply a thin layer of dry gauze between the electrode and the skin.
D) Strap electrodes tightly to the skin or place a sandbag on top of the electrode.