user: 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.

Ex 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

Ex Output:
D


Ex Input:
Article: The economic growth that many nations in Asia and increasingly Africa have experienced over the past couple of decades has transformed hundreds of millions of lives - almost entirely for the better. But there's a _ to that growth, one that's evident - or sometimes less than evident - in the smoggy, smelly skies above cities like Beijing, New Delhi and Jakarta. Thanks to new cars and power plants, air pollution is bad and getting worse in much of the world, and it's taking a major toll (,) on global health. How big? According to a new analysis published in the Lancet, more than 3.2 million people suffered deaths from air pollution in 2010, the largest number on record. That's up from 800,000 in 2000. And it's a regional problem: 65% of those deaths occurred in Asia, where the air is choked by diesel soot   from cars and trucks, as well as the song from power plants and the dust from endless urban construction. In East Asia and China, 1.2 million people died, as well as another 712,000 in South Asia, including India. For the first time ever, air pollution is on the world's top - 10 list of killers, and it's moving up the ranks faster than any other factor. So how can air pollution be so damaging? It is the very finest soot - so small that it roots deep within the lungs and then enters the bloodstream - that contributes to most of the public - health toll of air pollution including death. Diesel soot, which can also cause cancer, is a major problem because it is concentrated in cities along transportation zones affecting overpopulated areas. It is thought to contribute to half the deaths from air pollution in urban centers. Fro example, 1 in 6 people in the U.S. live near a diesel - pollution hot spot like a rail yard, port terminal or freeway. We also know that air pollution may be linked to other non - deadly diseases. Fortunately in the U.S. and other developed nations, urban air is for the most part cleaner than it was 30 or 40 years ago, thanks to regulations and new technologies like the catalytic converters   that reduce automobile emissions. Govemments are also pushing to make air cleaner - see the White House's move last week to further tighten soot standards. It's not perfect, but we've had much more success dealing with air pollution than climate change. Will developing nations like India eventually catch up? Hopefully - though the problem may get worse before it gets better. The good news is that it doesn't take a major technological advance to improve urban air. Switching from diesel fuel to unleaded   helps, as do newer and cleaner cars which are less likely to send out pollutants. Power plants - even ones that burn mineral fuels like coal - can be fitted with pollution - control equipment that, at a price, will greatly reduce smog and other pollutants. But the best solutions may involve urban design. In the Guardian, John Vidal notes that Delhi now has 200 cars per 1,000 people, far more than much richer Asian cities like Hong Kong and Singapore. Developing cities will almost certainly see an increase in car ownership as residents become wealthier - and that doesn't have to mean deadly air pollution. Higher incomes should also lead to tougher environmental regulations, which is exactly what happened in the West. We can only hope it happens before the death toll from bad air gets even higher. 
 Question: What tends to give rise to the highest death toll according to the passage? 
 Options: (A) The lack of tight environmental protection standards. (B) The increasing numbers of the diesel cars and trucks. (C) The frighteningly high death rate from deadly cancer. (D) The world's serious air pollution such as soot and dust.

Ex Output:
D


Ex Input:
Article: Who's in control of your life? Who is pulling your string? For the majority of us, it's other people - society, colleagues, friends, family or our religious community. We learned this way of operating when we were very young, of course.We were brainwashed.We discovered that feeling important and feeling accepted was a nice experience and so we learned to do everything we could to make other people like us.As Oscar Wilde puts it,"Most people are other people.Their thoughts are someone else's opinions,their lives a mimicry ,their passions a quotation." So when people tell us how wonderful we are,it makes us feel good.We long for this good feeling like a drug--we are addicted to it and seek it out wherever we can.Therefore,we are so eager for the approval of others that we live unhappy and limited lives,failing to do the things we really want to.Just as drug addicts and alcoholics live worsened lives to keep getting their fix ,we worsen our own existence to get our own constant fix of approval. But just as with any drug,there is a price to pay.The price of the approval drug is freedom--the freedom to be ourselves. The truth is that we cannot control what other people think.People have their own schedule,and they come with their own baggage and,in the end,they're more interested in themselves than in you.Furthermore,if we try to live by the opinions of others,we will build our life on sinking sand.Everyone has a different way of thinking,and people change their opinions all the time.The person who tries to please everyone will only end up getting exhausted and probably pleasing no one in the process. So how can we take back control? I think there's only one way--make a conscious decision to stop caring what other people think.We should guide ourselves by means of a set of values--not values imposed   from the outside by others,but inborn values which come from within.If we are driven by these values and not by the changing opinions and value systems of others,we will live a more authentic,effective,purposeful and happy life. 
 Question: What Oscar Wilde says implies that    _    . 
 Options: (A) we have thoughts similar to those of others (B) other people's thoughts are more important (C) most people's thoughts are controlled by others (D) most people have a variety of thoughts

Ex Output:


assistant: C