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.

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.
D

Article: My first experience of modern city life was quite impressive. I was very curious when I arrived in London. First, I noticed so many people were on a trip in a busy way. When I first saw the machine on the underground where you are expected to feed your ticket in and have to run through moving barriers , I was completely fascinated at it. Flashing with the light, the little green man, telling you when to cross the road, was also quite interesting, and so were those street advertisements which kept changing subjects as you look. In my native place, my life is so different from people's here. I am a market gardener from Makono, a village which is led by a market-managing group. People there usually walk two hours a day to get water from a well. What's more, I am used to going, for many hours, without drinking , so it was strange to be offered cups of tea all the time here in London. In my native place, on market days, I usually walk for several hours with my basket full of fruits and vegetables on my head, carrying them to the market for sale, to earn PS1per basket. Without the produce from my garden, I could not pay for education or healthcare for my children. Gardening is not a hobby for me - it's _ . But here people are planting something only to kill their leisure time. During our visiting-time in Britain, we visited some local government agencies, schools, churches and farms in Sussex, Scotland, Yorshire, Loncolnshire and Cambridgeshire, meeting people who were of the same profession as we are. Children in Burley-in-Wharfedale, Yorkshire, prepared a special get-together to greet us and we were also asked a lot about our life which was quite fascinating to them. For example, how we make our houses out of mud and how we get our water for our daily necessities, as well as for our garden.
Question: The most disadvantage in the writer's native place should be that _ .
Options: (A) there are many market-managing groups for gardeners (B) the lack of water makes the life there even harder (C) people there like to travel about on foot for enjoyment (D) people support themselves using the garden produce
B

Article: In high school, all Canadian students take part in a very exciting event. It is "Take Your Children to Work Day". Students will have a chance to work with their parents. My day took place in my mom's work, the York Region Police Department. When I arrived, a coach was teaching the officers basic combat skills. Everyone tried their best to practice. I could see them sweating and panting . The most exciting part of my visit was a stop at the 911 Communication Center. 911 is the same as 110,119 and 120 in China. Every 911 call in the city is answered here. When I entered the center, I stood beside a call dispatcher arid watched him dealing-with the calls. Suddenly, the phone rang, he picked it up and a woman cried for help. There was a robbery in her house. The call dispatcher told her, "Please calm down and move to the safe place quietly. Don't fight with them. Just let them take what they want. Please make sure you are not hurt. We are sending officers there." He followed the call and found the address. The call dispatcher chose the five closest police cars from the satellite map and clicked to send the policemen. I saw the police cars from the satellite map were quickly moving to the woman's house. Five minutes later, they arrived .I asked the call dispatcher why he sent five cars. He said, "There are different levels of emergencies. Robbery is a high priority ,so we have to send five cars." The day was interesting. I leaned how the different departments worked together. The officers were very friendly and admirable.
Question: What's the best title for the article?
Options: (A) An exciting day at a Police Department. (B) Robbery is a high priority. (C) How the police saved the woman. (D) The 911 Communication Center.
A