When it is 4:00 a. M. In Halifax, it is 1:00 p. M. In Karachi, and when it is 9:00 a. M. In Karachi, it is 5:00 a. M. In Warsaw. Mary left Halifax to fly to Karachi, but she accidentally left her watch on Warsaw time. According to Mary’s watch, she left Halifax at 9:40 p. M. On Monday. The local time when she arrived at Karachi was 3:00 p. M. Tuesday. How long was Mary’s flight? a. 9 hours, 20 minutes b. 13 hours, 20 minutes c. 14 hours, 20 minutes d. 17 hours, 20 minutes.