In this task, you're given an article, a question which often contains a blank and four options (associated with "A", "B", "C", "D"). Your task is to find the correct answer (from the given options) for the question from the given article and return one of the options from "A", "B", "C", and "D". Do not generate anything else apart from one of the following characters: "A", "B", "C", "D". There is only one correct answer for each question.

Ex Input:
Article: Some people make art with paint, and others use pencil or clay. But Italian artist Maurizio Savini prefers to use bright pink gum--after it has been chewed. Savini makes huge sculptures of bears and even people out of used chewing gum. Each sculpture requires thousands of pieces of gum. "I like to use chewing gum because it seemed to me a material that can be used in many ways compared with those used by the conventional arts such as painting," Savini says. How does he do it? The process is a lot like working with clay. "I work the chewing gum when it is warm and shape it with a knife," says Savini. Then, he puts a chemical onto each gum sculpture to make the gum stay in place. Savini's sticky art has been shown in cities like London, Paris, and Rome, where he lives today. Savini isn't the only artist to work with gum. His pink sculptures have inspired artists all over the world to get creative with the sticky matter. London artist Ben Wilson paints small paintings onto flat pieces of chewed gum he finds stuck to streets and sidewalks. In Canada, Jason Kronenwald uses different colored gum to make portraits of famous people. Kronenwald seldom chews gum himself. Instead, his friends help chew gum for him while he's working. "At times it can make me _ , but I just pay attention to the colors I need and get the sculpture going," he says. In America, Jamie Marraccini's art depends on color, so he tests different kinds of gum before using them. To find out what color the chewed gum will become once hardened, he lets it age for up to six months. "I've created 30 works totaling more than 35,000 pieces of gum," says Marraccini. That's a lot of gum! So think twice the next time you throw away a wad of gum. Maybe what seems like trash could actually be the beginning of a great piece of art.
Question: Marraccini stores the gum for six months in order to _ .
Options: (A) judge how hard it will be (B) know whether it is still sweet (C) examine what chemicals it contains (D) see what color it will become

Ex Output:
D

Ex Input:
Article: Students often want to practice their English outside class. One of the best ways to practice your English is to speak to a foreigner. You may ask, "Is it okay to try to talk to foreigners I see in the street?" The answer is yes and no, but probably no! If you see a foreigner who looks lost, it is polite to ask him, "May I help you?" But, otherwise, you should probably let them get on with their business. Situations, however, do exist where it is quite all right to talk to foreigners. If a foreigner enters your school, classroom, office, shop or restaurant, for instance, feel free to ask him (for example): -- What is your name? -- Where do you come from? -- What do you think of Beijing? -- How long will you stay in Beijing? There are also situations where it's okay to talk to foreigners in public places. If you see a foreigner alone in a restaurant, bar or coffee shop, it may be appropriate to ask him or her: -- Is this seat free? -- Do you mind if I talk to you in English? You can probably help them if they are new in China and if they are alone, you may be able to make them feel more welcome. After a few such questions, you should know whether this person wants to talk to you or not. If they ask you similar questions, or if they give long, informative answers, you're in luck. If not, then give them their privacy. Talking to strangers is fun if you choose the right time and place.
Question: It is the best way to practice your spoken English with _ .
Options: (A) Japanese (B) Americans (C) our classmates (D) French people

Ex Output:
B

Ex Input:
Article: "Blogging is helping students to think and write more critically ,"says an Australian researcher, "and can help draw out people who would otherwise not engage in debate." These are the preliminary findings of PHD research by Anne Bartlett-Bragg, a lecturer at the University of Technology, Sydney, who has been using weblogs or blogs in her own teaching since 2001. "The students are thinking more critically." she says, "They are learning to be responsible and they're communicating outside the boundaries of the classroom and the institution, and they like that. "Bartlett-Bragg says in conventional teaching, students often rely on the lecturer as the main source of ideas and critique for their work. "I'm a bit over listening to my students giving me back in an essay what I've told them in class." she says. "I want them to think for themselves and get different perspectives." "What makes blogs useful is their interactive nature." she says. These web-based forums for discussing ideas, experiences or opinions allow students to discuss publicly what they are studying with other students and experts outside their own university. "I really encourage them to put their personal opinion in there, provided they are informed and backed up with evidence." Bartlett-Bragg says because a lot of academics in her field of electronic or e-learning now have their own blogs, students can engage directly with them. She says one of the most powerful facilities in weblogs is pinging, which involves a person positing a comment about someone else's work on their own blog. They use the "Trackback" tool to notify the author when they have published the comment, basically inviting them to discuss it. "They get such a buzz when they make a comment on another person outside the boundaries of the institution and that person responds, or even gives them some further reading." she says. "They are getting new perspectives that I can't give them in a normal lecture."
Question: What Bartlett-Bragg likes most is that blogs can help students to _ .
Options: (A) think for themselves (B) have stronger sense of responsibility (C) know more about the world outside (D) finish an essay assignment easily

Ex Output:
A