Questions 155~157 refer to the following announcement. 
Welcome aboard our bus! Please take a moment to read through the followingpassenger guidelines:
● Boarding: Please arrive at the boarding point at least 10 minutes before thescheduled departure time. Boarding gates will close 5 minutes prior to thedeparture time.● Luggage: Each passenger is allowed to carry one piece of hand luggage and onechecked luggage. Hand luggage must be stowed in the overhead compartmentor under the seat in front of you. Please ensure your checked luggage is securelytagged.● Seating: Passengers are not allowed to reserve seats in advance. Seats areallocated on a first-come, first-served basis. Please do not change seats withoutthe driver's permission.● Safety: Seat belts must be worn at all times while the bus is in motion. Pleaserefrain from smoking, eating or drinking while on the bus.● Wi-Fi and Entertainment: We provide free Wi-Fi and on-board entertainment onmost of our buses. Please use headphones while listening to audio or watchingvideos. 
We hope you enjoy your journey with us. Thank you for choosing our bus service!
【題組】155.According to the announcement, can passengers reserve seats in advance?
(A) Yes, they can.
(B)No, they cannot.
(C) They can, but only for an additional fee.
(D) They can, but only if they are frequent passengers.