Which of the Following Is the Best Description of an Advance

Which of the following is the best description of an Advance Beneficiary Notice?

A) A written notice given to a Medicare patient after a denial of a claim is received
B) A written notice that a Medicare patient signs that states that the patient is unable to pay the 20 percent left over after Medicare pays
C) A written notice from Medicare given to a patient before certain services are performed that explains that Medicare may deny payment and, if so, the patient is responsible
D) A written notice given to any patients who present at a physician's office that informs them that they will be responsible for all charges