What fee enables unlimited mileage and liability coverage when selecting a rental car from the Government Rates tab?

The Government Administrative Rate Supplement (GARS) is the correct answer because this fee is specifically designed to provide government employees with certain benefits when renting a vehicle. By covering the cost of unlimited mileage and liability insurance, GARS ensures that the government personnel can perform their duties without worrying about additional costs that could arise from mileage limitations or unexpected liability claims.

Using GARS when selecting a rental car from the Government Rates tab streamlines the booking process, as it incorporates these critical coverages directly into the agreement, thus promoting compliance with government travel policies while enhancing the overall travel experience for personnel.