Altitude feet 2 000 1 000 Hot Air Balloon Ride 9 00AM 10 00AM 11 00AM 12 00PM 1 00PM 2 00PM The graph above shows the altitude of a hot air balloon over the course of a 5 hour flight During the flight the balloon floated at a constant altitude for 1 hour for the passengers to best view a historic landmark Based on the graph what time did the passengers in the hot air balloon begin viewing the historic landmark A 10 30 A M B 11 30 A M C 12 30 P M