{"answers": "D", "options": ["f : thanks you ! but the cd only cost me $ 13 . thank you though .", "f : thank ! the book is 50 % off , i just have $ 15 .", "f : thanks ! then i pay $ 24 for the cd .", "f : thanks ! can you lend me $ 9 so i can pay $ 24 in total ."], "article": "f : this book originally cost $ 30 , but i got a 20 % discount . unfortunately , i 've only got $ 15 . m : i 've got $ 13.00 , so i 'll lend you the rest .", "id": "train_5771"}