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.

Input: Consider Input: Article: When you make a mistake, big or small, cherish it like it's the most precious thing in the world, because in some ways, it is. Most of us feel bad when we make mistakes, beat ourselves up about it, feel like failures, get mad at ourselves. And that's only natural. Most of us have been taught from a young age that mistakes are bad, and we should try to avoid mistakes. We've been scolded when we make mistakes--at home, school and work. Maybe not always, but probably enough times to make feeling bad about mistakes an unconscious reaction. Yet without mistakes, we could not learn or grow. If you think about it that way, mistakes should be cherished and celebrated for being one of the most amazing things in the world. They make learning possible; they make growth and improvement possible. By trial and error--trying things, making mistakes, and learning from those mistakes--we have figured out how to make electric light, to paint the ceiling of the Sistine Chapel, to fly. Mistakes make walking possible for the smallest _ , make speech possible, and make works of genius possible. Think about how we learn:We don't just consume information about something and instantly know it or know how to do it. You don't just read about painting,or writing,or computer programming,or baking, or playing the piano, and know how to do them right away. Instead, you get information about something, from reading or from another person or from observing usually...then you construct a model in your mind...then you test it out by trying it in the real world...then you make mistakes...then you revise the model based on the results of your real world experimentation...and repeat, making mistakes, learning from those mistakes, until you've pretty much learned how to do something. That's how we learn as babies and toddlers, and how we learn as adults. Mistakes are how we learn to do something new--because if you succeed at something, it's probably something you already knew how to do. You haven't really grown much from that success--at most it's the last step on your journey, not the whole journey. Most of the journey is made up of mistakes, if it's a good journey. So if you value learning,if you value growing and improving,then you should value mistakes. They are amazing things that make a world of brilliance possible.
Question: Why do most of us feel bad about making mistakes?
Options: (A) Because mistakes make us suffer a lot. (B) Because it's a natural part in our life. (C) Because we've been taught so from a young age. (D) Because mistakes have ruined many people's careers.

Output: C

Input: Consider 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.

Output: A

Input: Consider Input: Article: Have you dreamed of building your own machine? Do you wish you could invent something new? Here we look at a few British inventions of recent times. Adaptable glasses Do you wear glasses? If so, can you imagine life without them? In 1985, Joshua Silver, a professor at Oxford University, asked himself, "Can I invent a pair of glasses that could be changed by the wearer?" He designed two plastic lenses that are filled with a special liquid. Using syringes you change the liquid between the lenses until you can see clearly. The glasses are not beautiful but they are easy to use and cheap to make. The wind-up radio When you switch your TV on tonight, think about all those people without electricity. Thinking about this, Trevor Baylis came up with the idea of designing a radio that could be powered by hand. In common with Joshua Silver he wanted his invention to be cheap and easy to use. He wanted even the poorest people in developing countries, who don't have electricity and cannot afford batteries, to use it. The radio has a generator which is powered by turning a handle. In 1996 it won a BBC Design Award for Best Protect and Best Design. The Dyson cleaner In many homes around the world you can see a cleaner that looks like a spaceship. This is the Dyson vacuum cleaner which uses something called "cyclonic separation" to separate the dirt. You do not need a bag for your cleaner and it does not get blocked so it is very practical. The idea came to Sir James Dyson after he kept having problems with his vacuum cleaner. He decided he could design a better one and in 1993 he opened his own factory. The Dyson is now one of the best-selling cleaners in the UK and Dyson is believed to have earned over a billion pounds. The Zapata fly-board Ever dreamed of zooming through the water and leaping in the air like a dolphin? Now you can thanks to a fly-board, built by water sports enthusiast Frank Zapata. With it you can dive back in the water and out again. It's possible to jump to incredible heights out of the water -- over 30 feet. The basic fly-board model comes in at PS4,200. So keep dreaming and inventing. One day you might get it right.
Question: What can we learn about Adaptable glasses?
Options: (A) They are very expensive. (B) The inventor is a student. (C) The glasses are fragile. (D) They don't look very nice.
Output: D