{"answers": "C", "options": ["f : it seems that history 107 is so difficult that few people would like to choose it .", "f : history 107 is indeed popular ! i 'm really lucky to get the last vacancy .", "f : wow , i never thought history 107 could be so popular .", "f : you are right , history 107 is really useful . but i do n't understand why only few people choose this course ."], "article": "m : you 've reached the number of the student registration office , if you want to reach the admissions office , press 1. for general information , press 2. good morning , admissions office . can i help you ? f : yes , my name is terry and i 'm interested in finding out whether history 107 is full yet . m : do you know the official registration code for that class ? f : it is his107bc3 . m : um ... ... it says that the class is full you could check back in a couple of weeks . some places will probably open up by that time . there 's a waiting list , and that means that you 'd have to wait for your turn to come up .", "id": "train_498"}