{"answers": "D", "options": ["f : then you should take a look at this one , it 's a racing one and it 's lighter . it meets all your requirement .", "f : then you should take a look at this one , it 's lighter so it 's convenient to deliver packages . it meets all your requirement .", "f : then you should take a look at this one , it 's lighter and more expensive . it meets all your requirement .", "f : i see , then you should definitely get him a heavier one ."], "article": "f : tom , this bicycle will be good for racing and it is n't very expensive . m : yes , but my son needs a heavier bike to use when he delivers his papers .", "id": "train_6212"}