If a Patient Refuses to Sign the Informed Consent Form

If a patient refuses to sign the informed consent form for an ECG, a good example of troubleshooting is to:

A) have a witness present and carry on with the procedure.
B) explain to the patient how the procedure works in order to get his/her consent.
C) have a relative sign the consent form.
D) put an X on the consent form to indicate that the patient was not competent.