{"answers": "C", "options": ["m : so , as i 'm mailing this package to china , it 's free and the change is $ 30 ?", "m : so , as i want to send it by surface mail , the change is $ 25 ? okay , i see .", "m : so , it needs $ 25 , and as i give you $ 30 , the change is $ 5 ? okay , i see .", "m : you mean the change is just $ 5 ? but you say that 's $ 20 , and i give you $ 30 !"], "article": "m : excuse me , i 'm mailing this package to japan . f : alright . fill out this form about the contents and value . do you want to insure it ? m : i do n't think so . it 's only some books . f : are you sending it surface mail or airmail ? m : airmail , please . f : ok. that 's $ 25 . m : here 's $ 30 . f : alright . here 's your change .", "id": "train_2242"}