The correct answer is A. Provides an adjustment at year end after charging a 100 percent advance premium . A garage policy may use a rating method that reflects the insured’s fluctuating exposure throughout the policy term. Under a monthly average basis, the insurer charges an advance premium at policy inception and later adjusts the premium according to the actual exposure reported or calculated for the policy period. This method is useful for garage risks because the number of vehicles, inventory, dealer plates, or operational exposure may change during the year. The key point is that the insured pays an advance premium first, and the final earned premium is determined after the insurer reviews the exposure information. If the final premium is higher, the insured may owe additional premium; if lower, a return premium may apply subject to policy terms. Option B is incorrect because the monthly average method is not simply a quarterly reporting arrangement. Option C is wrong because it refers to a partial advance premium of 75%, not the stated method. Option D is reversed, because if the adjusted premium is greater, the insured owes more. Course topic reference: Automobile, Crime, and Bonds; Garage Policies; Premium Rating; Monthly Average Basis .