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: The Mysterious Universe By Ellen Jackson and Nic Bishop How did the universe begin? How big is it? What is dark matter? Cosmologist and expert supernova hunter Alex Filippenko hopes that supernovas can help us answer some of these questions. But first we've got to find them! Join Alex and his team as they go on the hunt with huge telescopes and banks of computers. The Time and Space of Uncle Albert By Russell Stannard What would you say if your uncle asked you whether you would like to go into space? You'd say, "When do I leave?", just like the girl in this story. Gedanken is speeding across the universe trying to help her uncle answer some questions, such as "How big is space?" and "Where does gravity come from?" Along the way she also discovers how to get heavier without getting fat, how to live forever without knowing it, and the strange things that can happen when you go really fast. George's Secret Key to the Universe By Lucy Hawking and Stephen Hawking When George chases his pet pig through a hole in the fence, little does he expect that he will soon be riding a comet around Saturn . But just as he discovers the joys of space exploration with the computer Cosmos, which can open doors anywhere in the universe, everything starts to go wrong. When George's lest-favorite teacher steals Cosmos and traps his friend's dad in a black hole, can George set things right in time? A Child's Introduction to the Night Sky By Michael Driscoll With a telescope or without one, this book can get you started exploring planets, stars and even strange stuff like time, space, and black holes. The universe is a big place, but this book comes with a handy star finder that you can take out with you at night to help you find your way around the stars. Look up and discover the universe!
Question: According to the text, Alex Filippenko _ .
Options: (A) invented huge telescopes (B) is looking for supernovas (C) doesn't need many computers (D) knows a lot about dark matter

Output: B

Input: Consider Input: Article: I passed my driving test at the fourth attempt. You might think that means I'm not as safe as someone who passed on their first attempt. But would you feel safer with no driver at all? Maybe not, and that's why automotive firms have included driverassist functions in their driverless cars. This allows the human driver to take over if there is a problem. Google is one producer that has prototype driverless cars. These cars have been newly equipped with autosteering wheels and conventional controls to allow normal driving. But this is just a stage -- the vision is to have fully automated cars very soon. The director of Google's selfdrive project, Chris Urmson, hopes his 11yearold son will never have to take a driving test. To achieve that, the cars need to be on the roads in five years. He says driverless cars will greatly reduce accidents and traffic jams. According to Chris, about 1.2 million people are killed on the roads around the world each year. That number is equivalent to a jet falling out of the sky every day. He thinks gradual changes to existing car designs are not enough to deal with the problems. "If we are really going to make changes to our cities, get rid of parking lots, we need selfdrive cars," he says. Google's prototypes have covered over a million kilometers on the road. They have also had to deal with unexpected situations, such as a child driving a toy car in the road, and a woman in an electric wheelchair chasing a duck. In each case, the car reacted safely. Some are not convinced. Sven Beiker of Stanford University thinks driverless cars will still need human input in extreme circumstances.
Question: Chris Urmson mentioned his 11yearold son in order to show that _ .
Options: (A) traditional cars are harmful for kids (B) his son is not good at driving (C) his son is a slow learner in driving (D) driverless cars will come soon
Output: D