Final answer:
The correct answer to the student's question is 'd. Redetermination, 120 days,' where redetermination is the first level of appeal in the traditional Medicare appeals process, and the appeal must be filed within 120 days of the initial determination.
Step-by-step explanation:
The first level of appeal for traditional Medicare is known as redetermination, and the appellant must file the request for appeal within 120 days of the receipt of the initial determination. Therefore, the correct answer to the student's question is 'd. Redetermination, 120 days'. Filing a redetermination request is done by contacting the same Medicare contractor that made the initial determination. It's an important part of the Medicare appeals process for beneficiaries who disagree with the initial decision made regarding their coverage or payment.