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In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.
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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.
Answer: New York.
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Which of the following cities may be the cheapest for employees overseas?

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Article: Dad was always full of advice, but one of the biggest lessons he taught me one summer was about having a strong work ethic . When my brother and I were growing up, we mowed yards during the summer to earn pocket change. Dad was our salesman. He told our neighbors about our service and offered a price they could not refuse. My brother and I got $ 10 per yard. I later found out that our friends were charging $ 20 or more for the same amount of work. Every time we headed out to mow lawns , Dad was there to watch. I used to wonder why he came with us. He stood supervising our work in the heat when he could have been inside relaxing with air conditioning and an icy drink. One day we were cutting our next-door neighbor's yard, he always waited until the grass was knee-high to call us over. To make matters worse, we had an old lawn mower. This particular afternoon, I was finishing up and was tired and sweaty. I was just about to cut off the lawn mower when I saw Dad pointing to one piece of grass. He yelled, "You missed a piece." I frowned, hoping he would let it slide and let me go home. He kept pointing. So, tired and disappointed, I went back to cut that piece of grass. I said to myself, "That one piece isn't hurting anyone. Why won't he just let it go?" But when I reached adulthood, I understood his message ---When you're running a business, the work you do says a great deal about you. If you want to be seen as an entrepreneur with honesty, you must deliver a quality product. That single blade of grass meant the job was not done. Other neighbors took notice of the good work we did and we soon got more business. We started out with one client, but by the end of the summer we had five.
Answer: They mowed it carefully.
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Why did more and more people ask the brothers to mow their yards?

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Article: It was a bitter cold evening in northern Virginia many years ago. The old man's beard was glazed by winter's frost while he waited for a ride across the river. The wait seemed endless. His body became numb and stiff from the frigid north wind. It was long before he heard the faint, steady rhythm of hooves along the frozen path. Anxiously watching several horsemen coming up, he let the first one pass by without any effort to get his attention, then another passed by, and another. Finally, the last rider drew near where the old man sat like a snow statue when old man caught his eyes and said, "Sir, would you mind giving an old man a ride to the other side?" Stopping his horse, the rider replied, "Sure! Jump aboard." Seeing the old man unable to lift his half-frozen body from the ground, the horseman got down to help him. The horseman took him not just across the river, but to his destination just a few miles away. As they approached the tiny but cozy cottage, the horseman's curiosity caused him to inquire, "Sir, I noticed you let several other riders pass by without making an effort to secure a ride. Then I came up and you immediately asked me for a ride. I am curious why, on such a bitter night, you would wait and ask the last rider. What if I had refused and left you here?" The old man looked the rider straight in the eyes and replied, "I reckon I know people pretty good. I looked into the eyes of the other riders and immediately found no concern for my situation. It would have been useless even to ask them for a ride. But when I looked into your eyes, your gentle spirit would welcome the opportunity to give me assistance in my time of need." Those heart-warming comments touched the horseman deeply. "I'm so grateful for what you have said," he told the old man. "May I never get too busy in my own affairs that I fail to respond to the needs of others with kindness and compassion." With that, Thomas Jefferson turned his horse around and made his way back to the White House.
Answer: Because he was too numb to lift his half-frozen body.
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Why didn't the old man ask the previous riders for a ride?