instruction:
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: By 2050 there will have been an extra 2.5 billion people on earth. And what will they eat? To solve the problem, we should have to double our food production. We can also develop a diet of algae , insects and meat grown in laboratories. Algae can grow very quickly at sea, in polluted water and in places that would normally kill food crops. They are already eaten widely in Japan and China and they are eaten by almost everything from shrimps to blue whales. They can fix CO2 in the atmosphere and provide fats and sugars. Man-made meat looks like meat, feels like meat and it is meat, although it's never been from a living, breathing animal. Instead, it is grown from cells in big containers. Moreover, studies show that producing man-made meat will use far less water, energy and land. China has developed "green super rice", a series of rice types which produce more grain and have stronger ability to fight against floods, salty water, insects and disease. We used traditional plant breeding techniques to cross-breed more than 250 rice types. Green super rice, which is enough to feed an extra 100 million people, will be planted widely in the coming years. Insects like ants are not on most European menus but at least 1,400 kinds are eaten across Africa, Latin America and Asia. Now, with rising food prices and worldwide land shortages, such insects are getting more and more popular. Not only are many insects rich in protein , low in fat and high in Ca and Fe, but insect farms need little space. And they can grow well on paper, algae and industrial wastes.
Question: In order to exist in the future, people have to _ .
Options: (A) move to other planets (B) produce rain in laboratories (C) build new laboratories for food research (D) increase the food production or look for other food sources
answer:
D

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Article: It's a fact that we all dream. Some dreams seem to last for hours, others only for seconds. Some of us have strange dreams, some have interesting dreams, and some of us have unpleasant dreams. Tests in the 1980s showed that these dreams occur within 90-minute cycles, each cycle made up of six stages. In the last stage people experience rapid eye movement, known as REM, and it is in this stage that dreaming takes place. Eighty percent of people who were woken during this sixth stage could easily remember their dreams. On the other hand, when during the first five stages (NREM), only seven percent could describe a dream. However, of these same people woken during the first five stages, 74% were able to remember thinking activity, although they would not call it a dream. NerysDee, who has written about dreams in a book called "Your Dreams and What They Mean" says: "Perhaps during NREM sleep we are sorting out our outer mundane problems, but in REM sleep we are dealing with inside matters." She also makes the following statement about 90-minute cycle: It may also prove the reason why _ who wake in the middle of the night find it impossible to get to sleep again for at least an hour and a half. In other words, until they have missed out one complete 90-minute sleep period.
Question: Which of the following statements about dreams is TRUE?
Options: (A) Everyone dreams but very few can recall what they dream. (B) Some people have long dreams and others have very short ones. (C) People can only remember unpleasant dreams. (D) More than eighty percent of people can remember their dreams.
answer:
B

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Article: TOKYO-- At first glance, Japanese cellphones are young people's favorites, with elegant design and quick access to the Internet. However, despite years of competition in overseas markets, Japan's cellphone makers have little presence beyond the country's shores. The only Japanese cellphone maker with any meaningful global share is Sony Ericsson, and that company is a London-based joint venture between a Japanese electronics maker and a Swedish telecommunications firm. And Sony Ericsson has been hit by big losses. Its market share was just 6.3 percent in the first quarter of 2009, behind Nokia of Finland, Samsung Electronics and LG of South Korea, and Motorola of Illinois. This year, Mr Natsuno, who developed a popular wireless Internet service called i-Mode, invited some of the best minds in the field to debate how Japanese cellphones could go global. "The most amazing thing about Japan is that even the average person out there will have a very advanced phone, "said Mr Natsuno. Japan has 100 million users of advanced third-generation smart phones, twice the number of the United States, a much larger market. Many Japanese rely on their phones, not a PC, for Internet access. Indeed, Japanese cellphone makers thought they had positioned themselves to dominate the age of digital data. But they were a little too clever. In the 1990s, they set a standard for the second-generation network that was refused everywhere else. Then Japan quickly adopted a third-generation standard in 2001. However, it made Japanese phones too advanced for most markets. Several Japanese companies are now considering a push into overseas markets, including NEC. Panasonic, Sharp, Toshiba and Fujitsu are said to be planning similar moves. "Japanese cellphone makers need to either look overseas, or exit the business", said Kenshi Tazaki, a managing vice president at the consulting firm Gartner Japan.
Question: The cellphone company with the largest global market share is located in _ .
Options: (A) Japan (B) America (C) South Korea (D) Finland
answer:
D