A parking garage charges $3 per hour for up to 6 hours. For more than 6 hours, it charges a flat $18 for the day. Using the model that matches, what is the cost for 9 hours? Models: A) C(h) = 3h for all h B) C(h) = 18 for h > 6; C(h) = 3h for h ≤ 6 C) C(h) = 3h + 18 for h > 6 D) Table (h,C): (6,18), (7,21), (9,27)