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.
--------
Question: Article: *Basic Study Manual Hardcover: $ 37.50 Future success depends on the ability to learn. Here are the answers to the questions most often asked by parents, teachers, business trainers and by students themselves. Read this book and learn: * What the three barriers to study are - and what to do about them * What to do if you get tired of a subject you are studying * Twenty-six simple drills to help you learn how to study easily, rapidly and with full understanding * Buy and read the Basic Study Manual and use it to dramatically improve your ability to study. *Study Skills for Life Hardcover: $31.99 L. Ron Hubbard's study technology for teenagers opens the door to their future success by giving them the ability to study and learn. Fully illustrated for easy comprehension. * Learning How to Learn Hardcover: $24.99 The basics of effective study for 8-to 12-year olds, fully illustrated. Children who read and apply the materials in this book regain their liking for study and their ability to apply this knowledge in life. Get this book for a child you want to see win at his studies! * How to Use a Dictionary Picture Book for Children Hardcover: $34.90 In spite of billions of dollars spent on "educational research," children are not taught the most basic skills of learning, even the most basic of these: how to use a dictionary. In fact, a search of educational books for children found not one that told them how to use a dictionary -or that one should. Written for children 8 to 12-year old, this fully illustrated book will teach your child: * How to find words in a dictionary * The different ways that words are used * What the different marks and symbols that are used in a dictionary mean * How to use a dictionary to correctly pronounce words Includes a section for parents and teachers showing you how to use this book with children. Buy this book and give it to your children to unlock their education. What's more, you'll just pay 50% for it before May 1, 2008.
Question: According to the advertisements, the four books are all intended for _ .
Options: (A) teachers (B) adults (C) children (D) women

Answer: C

Question: Article: Recent research has claimed that an excess of positive ions in the air can have an ill effect on people's physical or psychological health. What are positive ions? Well, the air is full of ions, electrically charged particles, and generally there is a rough balance between the positive and the negative charged. But sometimes this balance becomes disturbed and a larger proportion of positive ions are found. This happens naturally before thunderstorm, earthquakes when winds are blowing in certain countries. Or it can be caused by a build-up of static electricity indoors from carpets or clothing, or from TV sets, duplicators or computer display screens. When a large number of positive ions are present in the air many people experience unpleasant effects such as headaches, fatigue , excessive anger, and some particularly sensitive people feel sick or even suffer mental disturbance. Animals are also affected, particularly before earthquakes, snakes have been observed to come out, rats to flee from their burrows, dogs howl and cats jump about unaccountably. This has led the US Geographical Survey to fund a network of volunteers to watch animals in an effort to foresee such disasters before they hit vulnerable areas such as California. Conversely, when large numbers of negative ions are present, then people have a feeling of well-being. Natural conditions that produce these large amounts are near the sea, close to waterfalls or fountains, or in any place where water is sprayed, or forms a spray. This probably accounts for the beneficial effect of a holiday by the sea, or in the mountains with streams or waterfalls. To increase the supply of negative ions indoors, some scientists recommend the use of ionisers. They claim that ionisers not only clean and refresh the air but also improve the health of people sensitive to excess positive ions. Of course, there are the detractors, other scientists, who dismiss such claims and are skeptical about negative/positive ion research. Therefore people can only make up their own minds by observing the effects on themselves, or on others, of a negative rich or poor environment. After all it is debatable whether depending on seismic readings to anticipate earthquakes is more effective than watching the cat.
Question: What is an ion according to the passage?
Options: (A) It's a charged particle. (B) It's basically static electricity indoors. (C) It's a balance between the positive and negative charged. (D) It's an ill effect on people's physical and psychological health.

Answer: A

Question: Article: "China now has 350 million smokers, accounting for one-third of the world total. Chinese smokers now become addicted to nicotine at the age of 19, five years earlier than the average starting age of 24 in 1997," a report said a couple of years ago. Of the 1.1 billion smokers all over the world. more than 800 million are in developing countries. And as the world's largest developing country, China also has the largest number of smokers. Some frightening facts start to appear when we examine who China's smokers are. Of the 350 million addicts, more than 100 million are under the age of 18, while more than 50 percent of male teachers and doctors are smokers. Such a high rate of addicts among male teachers and doctors will certainly have a bad impact on the young generation. Teachers are usually expected to be role models for students who tend to consider whatever they do is right and follow their example. It is very likely that the number of teenage smokers will increase in the near future unless measures are taken to forbid teachers from smoking in front of their students or designate schools as no-smoking zones. What is truly puzzling is why so many doctors smoke. They are aware of the results of the habit, such as high blood pressure and lung cancer. Their example only helps justify the addiction of so many others. If educated people set an example by stopping smoking at least in public places. it would be much easier to drive home the notion that it is uncivilized to smoke in public places. In China, there should also be a national law to ban smoking in public places. These would make a massive contribution to cutting the number of people in China who are smoking themselves into early grave.
Question: Which of the following can serve as the best title for the passage?
Options: (A) Time to Kick the Habit (B) China Bans Smoking in Public Places (C) Smokers in China (D) Make People Aware of Smoking

Answer:
A