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.

Example Input: Article: What's the most expensive place to station an employee overseas? London? Tokyo? Sao Paulo? Try Luanda, Angola. That's the finding of a survey by Mercer, the world's largest human resources consulting firm, headquartered in New York City. Two African cities (Luanda, N'Djamena) were in the top 10, along with four (Moscow, Geneva, Zurich, Bern) in Europe, three (Tokyo, Singapore, Hong Kong) in Asia and one (Sydney) in Australia. Switzerland alone has three cities in the top 10. Mercer's 2013 Cost of Living Survey examined data from 214 cities worldwide, comparing a market basket of over 200 goods and services, including unfurnished luxury two-bedroom apartments or three-bedroom houses, movie tickets, blue jeans, international newspapers, coffee, fast food restaurant meals, gasoline, milk and soda. If it sounds odd that Angola would be the most expensive, Mercer's Barb Marder explains that"Despite being one of Africa's major oil producers, Angola is a ly poor country yet expensive for expatriates since imported goods can be dear. In addition, finding secure living accommodations that meet the standards of expatriates can be challenging and quite costly."The survey found similar supply issues in N'Djamena, Chad, the other top 10 city in Africa. Mercer measured locations worldwide against New York, on a U.S. dollar basis, meaning that exchange rate shifts could impact the rankings. For example, although Tokyo is Asia's most expensive city for people who live in a foreign country, the weakening of the Japanese yen against the dollar makes it seem cheaper than it was a year ago. Canada, too, has become a bargain as the U.S. dollar strengthens against the Canadian dollar. Measurements were taken in March, 2013. What's the trend in the United States?"Overall, U.S. cities either remain stable in the ranking or have slightly decreased due to the movement of the U.S. dollar against the majority of currencies worldwide,"explains Mercer's Steven Nurney. However, that may change as real estate prices rise nationwide. New York is the nation's most expensive place to station expatriates. While housing is generally the most important factor in the survey rankings, the survey revealed some other significant differences in prices. For example, you may need a vodka chaser after paying $ 8.29 for a cup of coffee in Moscow, but the same coffee in Managua, Nicaragua would cost only $ 1.54. Expect to pay $ 20.10 for a movie ticket in London, versus $ 5.91 in Johannesburg.
Question: Which of the following cities may be the cheapest for employees overseas?
Options: (A) Geneva. (B) Sydney. (C) Tokyo. (D) New York.
Example Output: D

Example Input: Article: Good Teachers A language training school at Yayuncun needs two full-time teachers and three part-time teachers to teach adults, 12 students a class, oral English and business English during afternoons and evenings. Full-time teachers 25--30 hours per week, 10 000--2 000 yuan per month. Part-time teachers can choose the class to teach, 100--150 yuan per hour, according to your experience. Need native English speakers with teaching experience. Please send your RESUME and PICTURE to eslchina@ yahoo.com.cn Writers/Researchers Currently, Fisher's Travel SOS is looking for the freelance writer and researcher with experience in journalism and the ability to computers, it is part-time positions for our project that will take a month to complete. Work is conducted at home, and will take a couple of hours per day or less. Full training is given. Please refer to www.Fisherstravelos.com for more information on our company. Journalists and writers interested in the positions should directly contact Danielle-Chu at daniellechu@ fisherstravelsos. com with your details and CV . Full-time Waiters/Waitresses/Bartenders We are a beautiful modern world famous Tiki Bar looking for FULL-TIME staff --waiters/waitresses/ bartenders for its current expansion. If you are 18 to 25 years old, with good looks, wit and charm, this job is for you. Good English and basic restaurant experience are necessary but not required. Please contact us. Tel: 13370153195 Mail :dacfxa@ 163bi. com Advertising Sales You must have a "sales" personality -- you need to love knocking on doors, giving presentations, closing deals, and keeping your customers happy. You don't need any special degrees, and you don't have to speak English. It would be better if you should have advertising sales experience, but that's not a requirement. If this sounds fit for you, please email your resume to jobs @ chinadeco, com. cu.
Question: You must know English if you want to be _
Options: (A) a teacher (B) a waiter (C) a writer (D) a seller
Example Output: A

Example Input: Article: For pet owners, the hundreds of pet food recalls taking place each year has raised a lot of alarm. "Most people are caring pet owners, and they want to do what helps protect their pet," explains Will Post, founder and CEO, Hound & Gatos Pet Foods Corporation. "Yet the problem is that most are not sure what that means and how to go about it. The more they learn about pet food, the better able they will be to make an informed decision that will keep their pet healthier and safer." Here are several tips that consumers may want to keep in mind when it comes to choosing a pet food that will help reduce the risks. Get to know the company. Most people may know a company name simply because they spend millions on advertising. But that doesn't mean they know much about the company or their morals. Research companies to find one that offers high standards, quality products, and great customer service. Ask questions. Don't be afraid to get in touch with a pet food company and ask them where something was made, where ingredients came from, or any other questions. They should have no problem answering questions about their products, or with being able to provide proof of their quality standards. Read reviews. Do some searches to read some reviews about various brands of pet food. Keep in mind that some reviews can be one-sided and even planted by the company itself, so look for fair third-party sources giving the review. Investigate ingredients. The source of ingredients is of major concern when it comes to reducing the risks of pet food recalls and keeping pets healthy. Read the labels and ask questions to determine where the ingredients are coming from. Understand pet foods. Cat and dog food should contain 100 percent protein, which will supply them with the nutrients their bodies require. The problem with many commercial pet foods is that it is full of numerous fillers, such as cheap fillers and grains.
Question: How can people provide a safer and healthier environment for their pet?
Options: (A) By giving more food to their pet. (B) By getting a better understanding about pet food. (C) By accompanying their pet more. (D) By knowing more about their pet.
Example Output:
B