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: The Great Barn Adventure One morning when I was 11, I explored the town's abandoned round grain barn . I found a chained sliding door that was wide enough for me to pass through. Inside, there was a heavy smell of dead mice in the dark. After my eyes adjusted, I noticed a shaft that rose all the way to the top of the barn. On one side was a one-man elevator with a long rope and roller. I stepped onto the platform and gave the rope a drag and the elevator began sliding up the shaft, but stopped halfway. After a brief panic attack, I noticed holes in the wall at regular intervals, forming a ladder. For reasons known only to an 11-year-old, I decided it would be better to go up than down. So, with shaking hands, I began climbing the wall. After what seemed like forever, I reached the top of the shaft. I stood up, dusted myself off and found absolutely nothing of interest. It was just an empty room with a ladder leading up to the roof. I climbed all the way up here for this? Then I noticed a fire extinguisher ,which I'd always wanted to shoot off. So this was the chance of a lifetime. I tried it, and, much to my surprise, the thing worked! It shot out a thick cloud of powder that instantly filled the room. I couldn't breathe. I was going to choke to death, and they'd probably never even find my body. Luckily, I remembered the ladder to the roof. I climbed up, popped the straw roof and saw a bright blue sky. I suddenly realized the dust and powder pouring out of the top could draw attention. So when the dust had settled, I climbed down and slipped out of the chained door. I'm not sure if I was more excited about being alive or about not being caught, but I ran all the way back home.
Question: When the author got inside the barn, he _ .
Options: (A) noticed a man on the elevator (B) opened the chained sliding door (C) saw many dead mice in the dark (D) found a shaft leading to the top
Example Output: D

Example Input: Article: Do you start your work by making a list of all you have to complete, from walking the dog and washing the clothes, to phoning a or checking your emails? Do you always take a list with you to the supermarket? Do you write down all the steps you need to see a big project through? If you're a natural list maker you can consider this habit as a good thing to do. Here are some reasons: Gives your memory a kick: Even if you pride yourself on remembering all you need to complete, it's only human to forget every once in a while. A to-do list is a handy reminder. Helps you stay in the moment: It sounds surprising, but true. Trying to mentally keep track of the things weighing on your mind can make it tougher to concentrate on the activity at hand. _ : Instead of carrying around a nagging nervousness that you've forgotten to take care of a chore, keeping an up-to-date list can help relieve that kind of stress. Helps planning: Most of us are likely to put off until tomorrow what we can do today, but keeping a list helps to keep this natural impulse at bay. Thinking about what has to be done in advance is a good way to prevent us from falling behind schedule. Prioritizes : Seeing everything we want to take care of allows us to prioritize and give the most time to the more important tasks. On the other hand, not having a to-do list makes it possible for us to spend too much time on unimportant items. Boosts happiness: You will feel very happy each time you check off a task you have completed on your list. Studies show that reaching your goal actually releases feel-good chemical in your brain that boosts happiness.
Question: The author introduces the topic to be discussed by _ .
Options: (A) asking a series of questions (B) presenting some simple facts (C) stating his own point of view (D) listing the benefits of a to-do list
Example Output: A

Example Input: Article: A rare butterfly has been discovered in Britain for the first time in 60 years,having moved from Eastern Europe.The only previous record of a wild yellow-legged Tortoiseshell in Britain was in 1953,when it was seen just once in Sevenoaks,Kent.Several weeks ago,there were already four confirmed sightings,along the East coast in Norfolk,Suffolk and Kent,and six further reports of the butterfly in coastal areas. Conservationists are very excited about the sightings,which are rare in the butterfly world. The butterflies are thought to have flown on easterly winds across Europe in the last few weeks.The large and colourful insect mainly lives in Eastern Europe.In recent years,it has spread into Scandinavia and its number increases rapidly during warm weather.Also known as the Scarce Tortoiseshell,it has an orange and blue colour and is about one third bigger than our own Small Tortoiseshell. Butterfly Conservation was starting its annual Big Butterfly Count,a yearly survey of the butterflies across the nation.Sir David Attenborough,President of the charity,said,"The UK is a nation of amateur naturalists and we have a proud tradition of celebrating and studying our wildlife.By taking part in the Big Butterfly Count this summer,you can contribute to discovering the fantastic butterflies and other wildlife that share your garden,parks and countryside."He added,"Butterflies fought back last year after a terrible 2012 but despite this,butterfly numbers were still below average.Three quarters of the UK's butterflies are in decline and one third are in danger of dying out.This is bad news for the UK's birds,bees,bats and other wildlife.
Question: These rare butterflies usually live in _ .
Options: (A) Eastern Europe (B) Norfolk,Suffolk and Kent (C) coastal areas (D) Sevenoaks,Kent
Example Output:
A