{"answers": "D", "options": ["m : ok , i will call you later to buy my ticket . thank you for introducing train tour to me .", "m : it 's a good idea to buy the ticket on the bus , because it 's not busy from june to august .", "m : i have only 6 days to think about it , so i will buy my ticket online as soon as possible .", "m : thanks for your reminding . i will book it online once i know our travel dates ."], "article": "m : i want to book a bus tour for the middle of june . f : well , we have red and blue routes . the main attractions on the red route are the white house , the lincoln memorial and the smithsonian museum . m : how do i book the tickets ? f : well , you could do that by phone with one of our operators , or you can book through our website . of course , you could just show up and buy a ticket the day you want to take the tour . m : alright . i 'll just book it online once i know our travel dates . f : ok , well , just remember that it can get very busy over the three months from june to august . so it 's probably best to book at least a week before you come , but you still have about 6 weeks . so you have plenty of time to think about it .", "id": "train_4227"}