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.
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Question: Article: As a young adult, Noah Webster was a teacher. At this time, the colonies were fighting for independence from Britain. Yet the books that American children used in school all came from Britain. The books were all about British people and British places. Webster wanted books that would mean more to American children. So he wrote three books that used American examples -- a grammar book, a spelling book, and a reader. These books were very popular, and millions of them were sold. Webster was interested in changing the spellings of words. He wanted words to be spelled the way they were pronounced. For example, he thought the word "head" should be spelled "hed", and the word "laugh" should be spelled "laf". People liked Webster's suggestions. However, few words were actually changed. One group of words that were changed were words in which an unpronounced "u" followed an "o". That is why Americans write "color" and "labor", and the British write "colour" and "labour". With the money he made from his books, Webster was able to write. It was the first American English dictionary, published in 1828. Webster's dictionary had over 70000 words and gave the meaning and origin of each. To this day, Webster's work is the example that most dictionaries of American English follow.
Question: Which of the following statements is right?
Options: (A) Noah Webster had to borrow books from Britain when he was a student. (B) Noah Webster had his own government when he was very young. (C) When Noah Webster taught at schools, he wrote some story books. (D) As a teacher, Noah Webster wasn't satisfied with the books he used.

Answer: D

Question: Article: Oyster What is an Oyster card? Oyster is the easiest way to pay for journeys on the bus, Tube, tram, Docklands Light Railway (DLR), London Overground and National Rail journeys in London. You can store your travel cards, Bus&Tram Pass, season tickets and credit to pay for journeys as you go. Where to get an Oyster card? There are a number of ways for you to get an Oyster card: * At over 3,900 Oyster Ticket stops * At Tube and London Overground station ticket offices * At some National Rail stations * At London Travel information Centres * Online at tfl. gov. uk/oyster How to use an Oyster card? To pay the correct fare on the Tube, DLR, London Overground and National Rail services, you must always touch in on the yellow Oyster card reader at the start of your journey, and touch out at the end. If you don't, a maximum cash Oyster fare will be changed. When using the bus or tram, you must only touch in at the start, but not at the end of your journey. What happens if I don't visit London very often? Don't worry. Any pay as you go credit on your card will not expire , so you can keep it for your next visit or lend it to a friend. Fares Traveling by Tube from Central London (Zone l)to Heathrow (Zone 6) Adult Oyster single fare PS 4. 20 Monday to Friday 06:30 - 09:30 and 16:00 -19:00 PS 2. 70 at all other times including public holidays Adult single cash fare PS 5.00 For further information, visit tfl.gov. uk /fares.
Question: Which of the following is TRUE about Oyster cards?
Options: (A) They are limited in use to the owners themselves. (B) On National Rail services you must touch them on the reader twice. (C) They are not suitable for those who don't visit London often. (D) Oyster card Tube fares cost more on public holidays than on weekdays.

Answer: B

Question: 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.

Answer:
D