input question: Write a multi-choice question for the following article, with the given choices and answer: Article: Doctors fighting malaria---one of the deadliest diseases on the planet--- may soon have a new affordable weapon in their smart phones. Researchers have found a way to use the phone's camera to detect the microorganism in the patient's blood that causes the disease. According to the World Health Organization, almost 600,000 people died of malaria in 2013, making this mosquito-borne disease one of the deadliest in the world. The saddest aspect of this calamity is that it affects mostly young children. Early detection of the infection is important for successful treatment. But since the first symptoms resemble ordinary flu, a microbiologist must look at a drop of a patient's blood under a microscope for a proper diagnosis. Scientists in Britain have now developed a smart phone attachment called Xrapid, that turns the phone into a 200-power microscope, while the attached app---based on facial recognition software - quickly detects the parasitic protozoa in the blood smear . Jean Viry-Babel is the CEO of IanXen, the company that developed the app. He says it is cheap and works on the spot. "So we take a high-definition picture of a sample of blood. We separate the red blood cells from the rest---the white blood cells, the platelets ---and we start looking at each of the red blood cells individually," said Viry-Babel. Viry-Babel says the app is affordable, easy to use and provides reliability of up to 98 percent. The only additional equipment required is an ordinary glass lab slide - called a "slate." "There's only one button, which is called "Diagnose". So you put it on the slate and you put it on the dried blood, and you press diagnose and it tells you yes or no," he said. Researchers say the field-testing of the device will begin in January and February in Tanzania, Benin and Indonesia --- while commercial use is scheduled to start by the end of March. They also plan to expand the versatility of the new device---teaching it to recognize other diseases, such as tuberculosis and Lyme Disease. Options: A The app is cheap but must work in the lab. B The white cells and the platelets must be studied carefully. C The accuracy of the app is nearly a hundred percent. D The "Diagnose" button should function well with others. Answer: C The accuracy of the app is nearly a hundred percent. Question:???
output answer: What can we learn from Viry-Babel?

Write a multi-choice question for the following article, with the given choices and answer: Article: Once a neighbour stole one of Washington's horses. Washington went with a police officer to the neighbour's farm to get the horse, but the neighbour refused to give the horse up; he claimed that it was his horse. Washington placed both of his hands over the eyes of the horse and said to the neighbour, "If this is your horse, then you must tell us in which eyes he is blind." "In the right eye," the neighbour said. Washington took his hand from the right eye of the horse and showed the police officer that the horse was not blind in the right eye. "Oh, I have made a mistake," said the neighbor. "He is blind in the left eye." Washington then showed that the horse was not blind in the left eye, either. "I have made another mistake," said the neighbor. "Yes," said the police officer, "and you have also proved that the horse does not belong to you. You must return it to Mr. Washington." Options: A Because the neighbor was the police officer's friend. B Because he wanted to make the neighbor return the horse. C Because the police officer was Washington's friend. D Because they were invited to the neighbor's farm. Answer: B Because he wanted to make the neighbor return the horse. Question:
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Answer: Why did Mr. Washington go to the neighbor's farm with a police officer?

Problem: Given the question: Write a multi-choice question for the following article, with the given choices and answer: Article: Cowboy or spaceman? A dilemma for a children's party, perhaps. But also a question for economists, argued Kenneth Boulding, a British economist, in an essay published in 1966. We have run our economies, he warned, like cowboys on the open grassland: taking and using the world's resources, confident that more lies over the horizon. But the Earth is less a grassland than a spaceship--a closed system, alone in space, carrying limited supplies. We need, said Boulding, an economics that takes seriously the idea of environmental limits. In the half century since his essay, a new movement has responded to his challenge. "Ecological economists", as they call themselves, want to revolutionise its aims and assumptions. What do they say--and will their ideas achieve lift-off? To its advocators, ecological economics is neither ecology nor economics, but a mix of both. Their starting point is to recognise that the human economy is part of the natural world. Our environment, they note, is both a source of resources and a sink for wastes. But it is ignored in conventional textbooks, where neat diagrams trace the flows between firms, households and the government as though nature did not exist. That is a mistake, say ecological economists. There are two ways our economies can grow, ecological economists point out: through technological change, or through more intensive use of resources. Only the former, they say, is worth having. They are suspicious of GDP, a crude measure which does not take account of resource exhaustion, unpaid work, and countless other factors. In its place they advocate moreholistic approaches, such as the Genuine Progress Indicator (GPI), a composite index that includes things like the cost of pollution, deforestation and car accidents. While GDP has kept growing, global GPI per person peaked in 1978: by destroying our environment we are making ourselves poorer, not richer. The solution, says Herman Daly, a former World Bank economist and eco-guru, is a "steady-state" economy, where the use of... Options: A Ecology and economics are not mixed together B Human economy isn't recognized as parts of nature C The environment has both resources and wastes D Diagrams connect firms, households and the government Answer: B Human economy isn't recognized as parts of nature Question:
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The answer is:
According to ecological economists, what is the mistake existing in conventional textbooks?