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.

Article: What a great project this is, building your own greenhouse! If you're a gardener, then a greenhouse is necessary no matter where you live. As long as you've got some good plans, it's possible to build a backyard greenhouse within just a few days. It's a great way to impress the neighbors! Metal greenhouses are practical, I agree, but they look ugly. If you build your own backyard greenhouse from wood, you'll end up with a lovely looking Victorian-style greenhouse, which will last very long if you treat it with the correct wood protection. Of course you'll save a lot of money in the process too. How much exactly? It's difficult to say as it depends on how much glass costs where you live. After all, there isn't much wood required, as it's only the actual frame that is wooden. To make sure you save the most money, it's best to take your plans to wherever you plan to buy your materials. That way you won't end up wasting any money on unnecessary materials. To be honest, saving money is not the main reason for building your own greenhouse. It's the fun you'll get from building it and the pleasure you'll get from showing it off to your friends and family that makes the project worth doing. Nothing beats the feeling when someone asks you where you bought something and you turn around and say "Oh, actually, I built it myself!" That feeling is priceless! You'll never feel like that over something you've bought!
Question: According to the author, it is better to build _ .
Options: (A) a metal greenhouse (B) a grass greenhouse (C) a wooden greenhouse (D) a brick greenhouse
C

Article: December 2 Sharon called about four times today. At least it shows she's trying to explain something to me. I feel a little better. December 3 This morning Sharon said she had only told one person and didn't know why everyone seemed to know. Yes, I am an adopted daughter. But she had promised to keep it a secret for ever! December 5 I wish I had a friend I could really trust all of the time. I thought I found that friend, but I haven't and it's making me miserable ! It's wrong to tell her all about it. She gains my trust, and then loses it. December 7 I have a nice room, beautiful house and everything I've ever wanted. My adoptive parents will give me all the things I've ever dreamed of. Yet all the money in the world can't buy what I want now. I want for Sharon to be my best friend again. December 10 Sharon just called. She said she thought it might help if we spent more time together. She worried that I would switch schools . She is the best friend I've ever had. When I'm with Sharon, I can be myself. I need Sharon's friendship. I need it more than I've ever known. December 16 I just had the most _ two days of my life! This was the best time I've had for a long, long while. Yesterday, we walked five times around the park and today we walked along the river for twenty minutes. We talked so much. Sharon, Sharon, no brick wall between us now.
Question: What is the author mainly worried about?
Options: (A) How she was adopted. (B) Why she switched schools. (C) Her family life. (D) Her friendship with Sharon.
D

Article: Opportunity knocked on my door last January when I was given a chance to work in another country. At first, it seemed really scary for me to live on my own. But I had to overcome the true challenge! Luckily, I met seven new friends, six boys and one girl. They were really nice and I loved their company. We hung out most weekends. We cooked, watched movies, chatted and shared jokes! It was amazing -- until something unexpected happened ! One of my friends was diagnosed with kidney stones which needed to be removed as soon as possible. But our friend could not afford the surgery. He tried to get help from our other friends but they refused him. My heart cried for him! Our friends abandoned him just when he needed them most. I didn't know how to help him because I didn't have any money either. But I never lost hope. Instead I tried to think of other options. I told him not to worry because he might find a way somehow and everything would be all right. So I went to the hospital with him. I talked to the surgeon, asking him to do the surgery for him and promising to pay the expenses the next day (As if I had that money). I must have been convincing because the surgeon agreed to do it! Now, how was I going to get that much money? All I knew was that I needed to help my friend! I tried to borrow money from other friends but I failed. I tried selling my things but no one wanted them. Then I had to talk to my boss. I asked him if I could have my next two months salary in advance -- without even thinking on how I would survive for two months without money. He was surprised and asked me why. I told him that I had a friend who was really in need. Luckily, he gave my two months salary without hesitation! As soon as I had the money I ran to the hospital and paid all the bills. Friendship may not only be found in happy moments. Sometimes you can find it on the toughest time in your life!
Question: Why did the author go to the hospital with his friend?
Options: (A) To find free medical treatment for his friend. (B) To have his friend admitted into the hospital. (C) To pay the expenses of treatment for his friend. (D) To keep him company during the operation.
B