input: OPTIONS:
- It is organized by the government.
- It is held before Walk to Work Week.
- It has developed rapidly over the last 20 years.
- It encourages students to walk to school alone. Now, answer this question: Read the following article and answer the question. Article: Put your car keys away and forget about your travel pass --- it's time to do a bit of walking. National Walking Month is organized every May by Living Streets, an organization that campaigns for the rights and the needs of pedestrians, so the organization is previously known as the Pedestrians' Association. The association's aim is to make streets safe, attractive and enjoyable spaces for people to live, work, shop and play. By putting people (rather than vehicles) first, Living Streets wants to create streets and spaces where people feel happier, healthier and more sociable. The annual campaign gives participants a great opportunity to experience the many virtues of walking. These include the physical health benefits of becoming fitter; the environmental advantages of not using vehicles; the delight of local discoveries --- seeing more of your local areas on foot; the enjoyment of walking with other people, whether family, friends or work colleagues and finally the stress relief that comes from walking --- walking can clear your head. Walk to School Week, 18 to 22 May, is part of the month's activities and its aim is to encourage parents to send children to school on foot, rather than take them in the car or let them use public transport. The movement was started in 1995 with only five participating schools and now two decades later, more than one million children take part. Similarly, there is Walk to Work Week, 11 to 15 May, where grown-ups are encouraged to walk. In the morning, getting off the bus a stop early or parking a few streets away is a good way to add more steps to the daily total. And during the working day, after having lunch at the desks or in the canteen, take a walk and get some fresh air. Walk home with your workmates and chat away about everything under the sun but work! Question: What can we learn from Walk to School Week? Answer:
A:
output: It has developed rapidly over the last 20 years.

input: OPTIONS:
- They are too slim
- They work too hard
- They are too fat
- They lose too much body fat. Now, answer this question: Read the following article and answer the question. Article: In the United States, 30 percent of the adult population has a "weight problem.". To many people, the cause is clear: We eat too much. But scientific evidence does little to support this idea. Going back to the America of 1910, we find that people were slimmer than today, yet they ate more food. In those days people worked harder physically, walked more, used machines much less, and didn't watch television. Several modern studies, moreover, have shown that fatter people don't eat more on average than thinner people. In fact, some investigations (researches), such as a 1970 study of 3,545 London office workers, report that, on balance, fat people eat less than slimmer people. Studies show that slim people are more active than fat people. A study by a research group at Stanford University School of Medicine found the following interesting facts. The more the men ran, the greater loss of body fat. The more they ran, the greater their increase in food intake . Thus those who ran the most ate the most, yet lost greatest amount of body fat. Question: What kind of physical problem do many adult Americans have? Answer:
A:
output: They are too fat

input: OPTIONS:
- because the temperature is too high
- so that the plants can evaporate less water
- because they are drought resisters
- so that the plants can store more water Now, answer this question: Read the following article and answer the question. Article: Desert plants fall into two sorts according to the way they deal with the problem of surviving drought. There are the drought--avoiders--those which persist only as seeds, ready to spring up when it rains, to flower quickly and produce another crop of seeds, and to die again. There are also the drought--resisters--those which have evolved various methods for strong water, locating underground water, or reducing their need for water by such devices as shedding their leaves. The drought--resisters are perennials ,they manage to live from one rainy season to another, slowly growing bigger and bigger. Of these, the succulents is a small but interesting fraction . They may store water in their leaves, in their stems, or in underground containers. In the American deserts the best--known succulents are the cacti . They come in a wide range of sizes, from 50--foot tall giant saguaros to tiny round cacti about the size of a thumb--nail. They take thick, cylindrical or even spherical forms, thereby exposing a minimum of evaporating surface to the air and light. They are leafless, except in youth, and then the leaves are small. Typically their surfaces are spiny, discouraging thirsty animals, and channeled like an accordion , so the fleshy stem may expand quickly when the plant drinks and contract slowly as it uses up the water. The root system is widespread and shallow, with good reason; only about 3 per cent of the rain that falls on the desert penetrates to any significant depth into soil. Question: According to the passage, some desert plants drop their leaves _ . Answer:
A:
output:
so that the plants can evaporate less water