You Are Attaching ECG Electrodes to a 55 Year Old

You are attaching ECG electrodes to a 55 year old man who is complaining of a racing heart and lightheadedness. You have prepared the skin surface and removed the electrodes from their sealed protective wrap. Which of the following is true?

A) The protective backings should be peeled away to expose the gel disk and sticky surface of the adhesive pads.
B) The electrodes can be used even if they are past their expiration date.
C) The gel disk of the electrodes should be dry.
D) The electrodes should be applied by pressing down on the gel disk before applying pressure to the adhesive pad.