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: Roughly speaking, teachers in traditional education may feel that students are too young to know much about the world, and have to be told what to do most of the time. By contrast, open education offers teachers quite different feelings. Students are expected to be responsible for their own education--to discover subjects by themselves instead of being made to study them. This way of teaching allows the students to grow independently and to develop their own interests in many subjects. Some students who do badly in a traditional classroom will be happier in an open classroom and enjoy learning. They will not have to worry about grades or rules at all. However, many students won't do well in an open classroom. For these students, they will do little in school if there are too few rules. They will not make good use of open education, which is so different from traditional class, because they may have a problem getting used to making so many choices on their own. For them it is important to have some rules to direct them. They may worry about the rules even when there are no rules. In addition to that, some traditional teachers do not believe in open education and do not like it either. Since both of some good points and bad points of the open education have been explained clearly, you may have your own opinion on the issue. Personally, I think that the concept of open education is good only in theory. In actual fact, it may not work very well in a real class or school. I believe, most students, but of course not all students, need some structure in their classes. They may want and need to have rules. In some cases, they must be made to study some subjects. Many students are pleased to find subjects they have to study interesting. They would not study those subjects if they did not have to.
Question: Open education allows the students to _ .
Options: (A) grow as the educated (B) be responsible for their life (C) discover subjects outside class (D) develop their own interests

Ex Output:
D

Ex Input:
Article: I have this old clock that belonged to my mom. My dad gave it to me years ago after mom passed away. I have mixed feelings about having the clock. I love it because it was my mom's, but it also holds some bad memories. You see, it chimes. It counts out the hour and rings once on the half hour. Or at least it used to. Now you never know what number it will ring. When my mother was at home dying from cancer, she asked for the clock to be unplugged. Hearing the hours count down really angered and frightened her. Mom passed away. I decided I wanted to get the clock fixed so I could remember the good hours we had with her. I took it to a local clock shop the other day. "I know this has no particular value as a clock, but it was my mom's and I need to get it fixed," I said to the shop owner. I went on to describe the problem. "We get a lot of these in," he told me. "Here's what I do. We remove the clock works and replace it with a battery-operated movement that chimes electronically," he told me. "You can't fix this?" "No, we don't have the time nor the parts." I thanked him and went home. I called a few other places and was told the same thing. "How incredibly sad," I told the last one disappointedly. How incredibly sad that we have become a society that replaces craftsmanship with convenience and easy fixes. We copy the original instead of creating something new. We duplicate ; we don't originate . Sadly, the same goes for our attitude to life itself. Each of us is an original, one of a kind. But we find it so much easier to copy another style than to develop our own. We are wannabes rather than hey-world-look-at-mes. We fail to see the real value in who we are, so we spend our lives trying to be someone else.
Question: Why did the author decide to get the clock fixed?
Options: (A) Because it was a really old and valuable clock. (B) Because it was the only thing that her mother had left her. (C) Because it brought her memories of being with her mother. (D) Because it left the author with mixed feelings.

Ex Output:
C

Ex Input:
Article: Airtight plastic bags can help farmers protect their harvests without the use of harmful chemicals. These bags are designed to keep air out of crops in storage. Using them is a simple way to fight insects and keep crops fresh. Ten countries in West and Central Africa are involved in a project to improve the storage of cowpeas, also known as black-eyed peas. Farmers can lose much of the harvest to insects called bruchids , which grow from egg to adult in a few weeks and then lay forty to sixty eggs. They can destroy the whole harvest within months. Farmers can sell their crops immediately. But selling at harvest time means more competition and lower prices.Or they can use pesticides to kill the bugs. But a crop scientist Dieudonne Baributsa says, "They end up misusing or overusing the pesticide. In Nigeria, they have reported a lot of cases of death. They usually call cowpeas 'killer beans' in Nigeria." Mr. Baributsa is a researcher at Purdue University in Indiana, America. The project is called PICS---Purdue Improved Cowpea Storage. He says the storage bags are thick enough that any insects already in the cowpeas willdie from a lack of oxygen. The lack of air will also help prevent the growth of bacteria that can ruin the harvest. The bags cost about two dollars each. Mr. Baributsa says that is not much, especially if it means farmers can wait long enough to get a better price for their crops. The bags are produced locally. Donors currently support the project, but the groups involved are working to build a lasting market for the bags because donation for the project will not lastforever. A company based in the United States called GrainPro makes another kind of airtight bags. These are called SuperGrainbags. Phil Villers, the company's president, says storing a harvest safely not only helps farmers earn more money, but also reduces the amount of the harvest loss to insects, spoilage and mishandling. "What does not get wasted and eaten means it is possible to feed a hungry world," said Phil Villers.
Question: What is the best title for this passage?
Options: (A) Simple bags save the harvest. (B) Plastic bags kill the insects. (C) Bruchids do harm to the harvest. (D) Pesticides threaten food safety..

Ex Output:
A