In this task, you're given an article, a question which often contains a blank, four options (associated with "A", "B", "C", "D") and the answer to that question. Your task is to classify whether the given answer is correct or not by providing "Yes" or "No", based on the article.

[EX Q]: Article: I must have been about fourteen then, and I put away the incident from my mind with the easy carelessness of youth. But the words, Carl Walter spoke that day, came back to me years later, and ever since have been of great value to me. Carl Walter was my piano teacher. During one of my lessons he asked how much practicing I was doing. I said three or four hours a day. "Do you practice , an hour at a time?" "I try to." "Well, don't," he exclaimed. "When you grow up, time won't come in long stretches. Practice in minutes, whenever you can find them five or ten before school, after lunch, between household tasks. Spread the practice through the day, and piano-playing will become a part of your life." When I was teaching at Columbia, I wanted to write, but class periods, theme-reading, and committee meetings filled my days and evenings. For two years I got practically nothing down on paper, and my excuse was that I had no time. Then I remembered what Carl Walter had said. During the next week I conducted an experiment. Whenever I had five minutes unoccupied, I sat down and wrote a hundred words or so. To my astonishment, at the end of the week I had a rather large manuscript ready for revision, later on I wrote novels by the same piecemeal method. Though my teaching schedule had become heavier than ever, in every day there were idle moments which could be caught and put to use. I even took up piano--playing again, finding that the small intervals of the day provided sufficient time for both writing and piano practice. There is an important trick in this time--using formula: you must get into your work quickly. If you have but five minutes for writing, you can't afford to waste four chewing your pencil. You must make your mental preparations beforehand, and concentrate on your task almost instantly when the time comes. Fortunately, rapid concentration is easier than most of us realize. I admit I have never learnt how to let go easily at the end of the five or ten minutes. But life can be counted on to supply interruptions. Carl Walter has had a tremendous influence on my life. To him I owe the discovery that even very short periods of time add up to all useful hours I need, if I plunge in without delay.
Question: Which of the following statements is true?
Options: (A) The writer didn't completely take the teacher's words to heart at first. (B) Carl Walter has had a great influence on the writer's life since he became a student. (C) The writer owes great thanks to his teacher for teaching him to work in long stretches. (D) Rapid concentration is actually more difficult than most people imagine.
Asnwer: A
[EX A]: Yes

[EX Q]: Article: Sustainable development is applied to just about everything from energy to clean water and economic growth, and as a result it has become difficult to question either the basic assumptions behind it or the way the concept is put to use. This is especially true in agriculture, where sustainable development is often taken as the measure of progress without a proper appreciation of historical and cultural perspectives. To start with, it is important to remember that the nature of agriculture has changed markedly throughout history, and will continue to do so. Medieval agriculture in northern Europe fed, clothed and sheltered a mainly rural society with a much lower population density than it is today. It had minimal effect on biodiversity, and any pollution it caused was typically localized. In terms of energy use and the nutrients captured in the product it was relatively inefficient. Contrast this with farming since the start of the industrial revolution. Competition from overseas led farmers to specialize and increase yields. Throughout this period food became cheaper, safer and more reliable. However, these changes have also led to habitat loss and to reducing biodiversity. All this means that agriculture in the 21st century will have to be very different from how it was in the 20th. This will require thorough thinking. For example, we need to move away from the idea that traditional practices are certainly more sustainable than new ones. We also need to abandon the notion that agriculture can be "zero impact". The key will be to abandon the rather simple and static measures of sustainability, which centre on the need to maintain production without increasing damage. Instead we need a more dynamic interpretation, one that looks at the pros and cons of all the various way land is used. There are many different ways to measure agricultural performance besides food yield: energy use, environmental costs, water purity, carbon footprint and biodiversity. It is clear, for example, that the carbon of transporting tomatoes from Spain to the UK is less than that of producing them in the UK with additional heating and lighting. But we do not know whether lower carbon footprints will always be better for biodiversity. What is important is recognizing that sustainable agriculture is not just about sustainable food production.
Question: How do people often measure progress in agriculture?
Options: (A) By its impact on the environment (B) By its contribution to economic growth (C) By its productivity (D) By its sustainability
Asnwer: B
[EX A]: No

[EX Q]: Article: Elephants scored a big win in 2010. Representatives from 175 countries at the United Nations' Convention on the International Trade in Endangered Species (CITES) in Doha, Qatar, rejected a bid to allow the sale of ivory. Two African nations, Tanzania and Zambia, had asked to open the ivory trade. Conservationists feared that weakening a 21-year-old ban on the sale of ivory would have encouraged illegal hunting and hurt elephant populations. African elephants once numbered in the millions. Today, there are fewer than 500,000. "People born in 100 years should be able to see an elephant, " said Noah Wekesa, Kenya's minister of forestry and wildlife. His country voted to keep the ban. In the 1980s, as many as one million elephants were killed throughout Africa. Hunters killed the animals for their ivory tusks, which were used to make jewelry and other items. " The slaughter of elephants in Africa was just terrible, " says Paul Todd of the International Fund for Animal Welfare ( IFAW ). The group works to protect animals. The ivory wars continued until 1989, when CITES voted to ban all trade in ivory. With trade controlled, demand for ivory fell. Elephant populations began to increase slowly. Tanzania and Zambia asked CITES to allow ivory sales from government stockpiles . Ivory is so expensive that it's known as "white gold". Tanzania holds almost 200,000 pounds of ivory, which is worth as much as $20 million. Zambia has 48,000 pounds of the "white gold". The two countries argued that their ivory had been taken from hunters or had come from animals that died naturally. They said this income from the sale of ivory would help the countries. Wildlife experts, who believe that the ivory trade encourages illegal hunting, cheered the CITES decision. "It's a rare victory for elephants," said Jason Bell-Leask, the IFAW's director for southern Africa.
Question: What is the purpose of the passage?
Options: (A) To report the news of the banning of ivory trade. (B) To introduce the crisis that elephants face in Africa. (C) To call on people around the world to protect elephants. (D) To show us the ivory trade in Tanzania and Zambia.
Asnwer: A
[EX A]:
Yes