input: Please answer the following: Write a multi-choice question for the following article, with the given choices and answer: Article: Researchers have found more evidence that suggests a relationship between races and rates of lung cancer among smokers. A new study shows that black people and Native Hawaiians are more likely to develop lung cancer from smoking. It compared their risk to whites, Japanese-Americans and Latinos. Researchers at the University of Southern California and the University of Hawaii did the new study. The New England Journal of Medicine published the findings. The eight-year research studied more than 180,000 people. They included present and former smokers and people who never smoked. Almost 2,000 people in the study developed lung cancer. Researchers say genetics might help explain the racial and ethnic differences. There could be differences in how people's bodies react to smoke. But environmental influences, including the way people smoke, could also make a difference. African-Americans and Latinos in the study are reported smoking the fewest cigarettes per day. Whites are the heaviest smokers. But the scientists point out that blacks have been reported to breathe cigarette smoke more deeply than white smokers. This could fill their lungs with more of the chemicals in tobacco that cause cancer. Scientists know that some diseases effect different groups differently. And some drug companies have begun to develop racially targeted medicines. Last June, the United States Food and Drug Administration approved a drug designed to treat heart failure in black patients. The name is BiDil. The agency called it "a step toward the promise of personalized medicine." Options: A heavy smokers in America B the black and white people C the Asians and Hawaiians D smokers and non-smokers Answer: D smokers and non-smokers Question:
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output: People in the new study are made up of _ .

Please answer this: Write a multi-choice question for the following article, with the given choices and answer: Article: A few degrees can make a big difference when it comes to food storage. Foods can go bad if they get too warm. But for many of the world's poor, finding a good way to keep food cool is difficult. Refrigerators are costly and they need electricity. Yet spoiled food not only creates health risks but also economic losses. Farmers lose money when they have to throw away products that they can not sell quickly. But in 1995, a teacher in northernprefix = st1 /Nigerianamed Mohammed Bath Abba found a solution. He developed the "Pot-in-Pot Preservation/Cooling System". It uses two round containers made of clay. A smaller pot is placed inside a larger one. The space between the two pots is filled with wet sand. The inner pot can be filled with fruit, vegetables or drinks. A piece of wet cloth covers the whole cooling system. Food stored in the smaller pot is kept from spoiling through a simple evaporation process. Water in the sand between the two pots evaporates through the surface of the larger pot, where drier outside air is moving. The evaporation process creates a drop in temperature of several degrees. This cools the inner pot and helps keep food safe from harmful bacteria. Some foods can be kept fresh this way for several weeks. People throughoutNigeriabegan using the invention. And it became popular with farmers in other African countries. Mohammed Bah Abba personally financed the first five thousand pot-in-pot systems for his own community and five villages nearby. In 2000, the Rolex Watch Company ofSwitzerlandhonored him with the Rolex Award forEnterprise. This award recognizes people trying to develop projects aimed at improving human knowledge and well-being. A committee considers projects in science and medicine, technology, exploration and discovery, the environment and cultural history. Winners receive financial assistance to help develop and extend their projects. The award is given every two years. The next one will be given in 2008. Options: A 1995 B 2000 C 2004 D 2007 Answer: D 2007 Question:
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Answer: From the text we can infer this article was probably written in _ .

input question: Write a multi-choice question for the following article, with the given choices and answer: Article: Competition. It's a simple word, yet a very complex word that covers many angles when it comes to how gasoline prices are determined. It seems so easy to explain, but don't let that trick you--it's incredibly difficult to explain and adequately understand. Say you're on a Sunday afternoon drive, and notice a gas station near you charging $3.50. Down the road a few miles, that price could easily be 10 or more cents higher or lower. The question is "how" or "why" is that? Think of it this way. Are you more likely to get a better deal on a car if there are two similar car dealers next to each other? Perhaps, because the dealers are too close. Say there is a third similar car dealer miles away. Is he going to be at the same level of competition and sell his cars for the same price as the two dealers next to each other? Likely not. He may charge more or less. Maybe people don't know there are two other dealers down the road. Maybe the dealer is almost outside of the city and the land value isn't as high, so his taxes aren't as high. These situations do take place at gas stations. And more factors can impact what a station will charge. Timing can greatly impact what price a station charges as well! Many motorists fail to realize that the price a station pays for gasoline changes daily. If one station gets lucky and buys gas on Monday and the cost goes up Tuesday, the station that bought on Monday doesn't necessarily have to raise prices like the station that bought on Tuesday. Maybe the station that got caught buying for a higher price on Tuesday will pass that higher cost on by raising its gas price. Perhaps the difference is what brand the station is---branded stations usually pay a slightly higher cost for their gasoline. In return for paying a higher cost, those stations are guaranteed first supply in case of emergency situations. Independent stations don't pay as much, but aren't guaranteed supply. While competition sounds easy to understand, there are always a large number of factors that could influence what... Options: A a gas station always wants to charge more B the gasoline is in great demand C the cost of the gas the station buys varies daily D gas is in greater need on Monday Answer: C the cost of the gas the station buys varies daily Question:???
output answer:
The gas prices of a station always change partly because _ .