Read the paragraph. north run high school hosts a wide variety of clubs. some clubs are academic, such as the debate club, foreign-language clubs, and the chess team. other clubs are service-oriented, such as the key club. the most popular club at north run is the future business leaders of america, which boasts 165 members. what is the author's purpose?

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