A、BECAusE it’’s thE holiDAy sEAson.
B、BECAusE thE tiCkEts ArE solD At A DisCount.
C．BECAusE only onE or two Flights ArE AvAilABlE EACh DAy.
D．BECAusE thE othEr Flights hAvE BEEn CAnCEllED、