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.

Example Input: Article: As a music teacher for twenty-seven years, I have always known that music touches the soul. It can break through all kinds of barriers to reach students in a very special way. It can be the means for each child to find their light. A few years ago, I was blessed with the opportunity to teach pre-school students one afternoon a week. One of my most memorable students was Vanessa. She was five years old, had difficulty walking, and could not speak. We mostly sat on the floor for our music lessons and Vanessa liked to sit on my lap. One of her favorite songs was John the Rabbit. It was a call and response song where I sang the call and the students clapped two times while singing the repeating phrase, "Oh, yes!" Vanessa liked to put her hands together with mine and clap with me. We performed that song during every class, Vanessa and I clapping together. She never said or sang a word. One day late in the school year, when the song was finished, Vanessa turned around, looked me in the eye, clapped her tiny hands two times and said the words "Oh, yes!" I opened my mouth and could not speak. Through music, we had made a connection. Several years later, I came across Vanessa on the street in town. I stopped my car and waved to say hello. She waved back with a big smile on her face and then clapped her hands two times, mimicking the song we had performed in our music class. This precious little girl, through her connection with music, left an impression on me that will last forever. Every child has the ability to learn and grow. It is up to us educators to discover the way to reach each and every one of our students. We all must find each child's light.
Question: The author thinks music _ .
Options: (A) can make children calm down (B) Can connect heart to heart (C) Is difficult for pre-school students (D) Is a good means to find a job
Example Output: B

Example Input: Article: Water is of vital importance in a healthy diet and lifestyle. There are many health benefits of drinking water .It helps get _ out of our systems. It aids in the delivery of oxygen and nutrients .In fact, nearly every system in our bodies depends on water for proper functioning .But how can we tell whether the water we're drinking is healthy? As to tap water, it's relatively easy .If your water comes from a governmental source , the suppliers are required by law to provide annual water quality reports .If you have a well, you can have an authorized lab test your water .It may cost $100 or more, but it's a small price to pay for peace of mind . When it comes to bottled drinking water, it can be more difficult to know what you're getting .Start by checking the label or the bottle cap. Some may tell you that the water comes from a governmental source or "community water system", which means tap water .If the label doesn't give any information, you can call the bottler and ask .But don't be surprised if you get the runaround and are transferred to several different departments .Some states have a bottled water program that tracks bottled drinking water and can tell you the origin of the water as well as other information . Safe and healthy drinking water has become big business .Thousands of companies are competing for your hard earned cash , and some are not always honest about what their products offer .The initial investment in a home drinking water filtration system can seem expensive at first , but over time , it is usually less expensive than bottled drinking water .And with a water filter , you at least know where the water you drink comes from and how it is treated . Before going out and spending your hard earned money on bottled drinking water , it's a good idea to do some research .You're likely to find that a drinking water filtration system or purifier is a healthier choice and provides the best value as well .
Question: By using a water filter, people _
Options: (A) can drink water without fearing that the water isn't treated (B) will have to pay more money eventually than if they just drink bottled water (C) will know if the water company is honest or not (D) can check the quality of the water by themselves.
Example Output: A

Example Input: Article: For the past four years, the Green Festival in Washington, D.C., has brought together people from around the country who are interested in the environmental movement. The groups call the festival "a party with a purpose". They say the purpose of the Green Festival is to create an economy in which natural resources are used in a way that does not destroy the environment. To the people who organize the event, "green" means having a safe and healthy community and a strong local economy. Throughout the two-day event, over one thousand people volunteered to help the festival run smoothly. Four hundred businesses and organizations showed their products and projects. About three thousand visitors came to the party. They could find everything from naturally made organic food to clothing made from bamboo plants. There were over one hundred fifty speakers and discussion groups. For example, you could learn how to be an environmentally friendly traveler. You could also watch several movies about political and environmental issues. Then you could listen to some live music performances. After sitting for too long, visitors could take a yoga exercise class. There was even an area for children. Younger visitors could enjoy fun games and lessons on subjects like protecting the rainforest and creating chocolate sweets. Green building was one of the important subjects at the festival. Many companies and organizations aim to create environmentally safe buildings. They design structures with reduced energy use, fewer chemicals and more recycled materials. The Loading Dock is an organization based in Baltimore, Maryland. Its message is that "a person could build a house with what others throw away". The Loading Dock collects donations of used building materials such as flooring, lighting, doors, and windows. These materials would otherwise end up in a landfill trash center. Then, the group resells the materials. This way, the materials are recycled. This form of recycling provides entire families and neighborhoods with low cost solutions for rebuilding their communities. Spending a day at the Green Festival showed people many solutions for improving the health of our planet. People have _ green choices, from the things people buy to the ways people eat, think, and live. The Green Festival connects a wide community of people who care deeply about, and are working to improve, our shared environment.
Question: What is the purpose of the Green Festival?
Options: (A) To bring people together. (B) To study the environment. (C) To improve people's health. (D) To develop a green economy.
Example Output:
D