Hal earns a B on 75% of his tests. He divides a spinner into 12 equal spaces to model the grades he earns on his tests, with nine of the spaces representing a B. Which statement about his model is true? OA. His model can be improved the most by using eight of the spaces to represent a B. B. His model can be improved the most by using every third space on the spinner to represent a B. OC. His model cannot be improved. OD. His model can be improved the most by dividing the spinner into 15 equal spaces.