{"answers": "C", "options": ["f : so you should pay me totally $ 520 .", "f : you 'll only have to pay $ 20 for a 80 % discount on these goods .", "f : the total price after the discount is $ 80 .", "f : you 'll give me $ 100 in all ."], "article": "m : how much is that in total ? f : $ 100 , but if you have a membership card i can give you a 20 % discount . m : great . this is my membership card .", "id": "train_4940"}