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.

Example Input: Article: This site , all-birds. com, is about bird watching. Enjoy your browsing. There is much to learn and see. Bird Watching Equipment Some items that might make bird watching more enjoyable are binoculars ( ) , a camera, some kind of system for keeping notes, and maybe a back pack. Birders often keep lists of the birds they see along with notes about the habits. There is some great bird log software that will let you keep records on your computer. For more details on choosing binoculars see our Binocular -Optics page. Clothes If you are walking through a wooded area just wear clothes you would wear on any hike or field trip. You are best off wearing clothes with dull colors that mix into the background. Greens, browns, and grays are good. Avoid fabrics that rustle easily. Depending on the birds you are watching you may want to get rain gear, rubber boots and warm clothing. For birds such as owls that you might look for in the evening a strong flashlight is also handy. Choosing a Bird Field Guide Take a good field guide to identify birds. Look for clear color pictures that make it easy to recognize one bird from another. Next to each picture should be detailed descriptions of each bird's anatomy, habits, and what it eats. The guide should have information about what habitat each species uses. Many guides have maps showing the range of different birds along with their migration patterns. Where and When to see Birds Learning the habitats of birds in your area will increase the number of birds you see, and make your birding more enjoyable. If you know that Meadow larks are likely to be in open grassy areas, and dippers are forage along stream beds, you may be looking for them if you are in those types of habitats. Edge areas where different types of habitats meet will likely have more species in them. You are more likely to see specific birds at certain times of the day. For example songbirds are easier to see two to three hours after dawn, or just before sunset. This is when songbirds are most actively feeding. Many small birds will be silent or even hidden during the rest of the day. After sunup is the best time to see eagles and hawks. Visibility is best for hunting at this time, and they can soar on the thermal currents from the warmed air. Birds like owls are more likely to be seen in the evening. Many shorebirds and waders rest at high tide and feed when the water rises or falls. Photographing Birds Patience in Bird Photography Most birds are afraid of people, and all species have their own comfort zone. With a little time you can learn the comfort zone of the birds you are photographing. Once they know that you are not a threat you may be able to get closer. Type or Style Your reason for photographing birds may determine your style and the kind of equipment you use. If you are just recording the kinds of birds you see you don't need to get as close, and you can use less expensive equipment, then you need for high quality prints. Photographing Birds in Flight Photographing birds in flight can be fun. Many digital cameras have a tracking function. With these you focus on the bird, and then as you track it the lens will keep focus. Use Your Yard Choose an open area where the birds will get direct sunlight, showing off their magnificent colors. Try using props Birds will often land on a stick or post near a seed feeder before going to the feeder. The background was just an out of focus fence but you can use anything you want for a background, and then wait for a bird to perch.
Question: The main purpose of the passage is to _ .
Options: (A) attract more people to photograph birds (B) help birders learn how to identify and understand birds (C) call on people to set some comfort zones for birds (D) inform birders of the results of a scientific research on birds
Example Output: B

Example Input: Article: The first chocolate was eaten by people in South America hundreds of years ago. In those days, the people did not really eat chocolate. They used the cocoa bean to make a chocolate drink and they enjoyed it very much. Many years later, the cocoa bean was brought to other countries and people came to love the taste of chocolate. In 1824, John Cadbury opened a small shop in Britain. One of the things he sold was chocolate drink. In 1831, he opened a factory to make chocolate drink. He wanted to encourage people to drink chocolate instead of other drinks. A few years later, a man called Joseph Fry found a way to make chocolate instead of only drinking it. But at that time chocolate was very expensive and only the rich people could buy it. Later, ad more and more chocolate bars were produced and sold, it became cheaper. However, at first only plain chocolate (a kind of chocolate without milk and with very little sugar) was produced. Milk chocolate came later and this was made by adding milk to the chocolate. The first milk chocolate bar was made in Cadbury's factory in 1897. Their most famous chocolate, Cadbury's Milk Bar, was made in 1905, It has been the most popular chocolate in Britain and around the world for over 100 years. The Cadbury factory is still in Britain and the chocolate produced there is eaten all over the world. Every year, thousands of visitors visit the factory in order to see how chocolate is made.
Question: Hundreds of years ago, people first began to drink chocolate in_.
Options: (A) South Americ (B) South Africa (C) Britain (D) Australia
Example Output: A

Example Input: Article: The use of lotteries to allocate school places is to be reviewed by the British government because more than 20 percent of children are failing to get into their first-choice schools in parts of the country. The struggle for secondary school places has reached record levels this year, increasing anxiety for hundreds of thousands of families. A report from 43 local authorities suggests that in many areas, up to a fifth of children face disappointment. Families in London are the hardest hit. This week is admissions week, when about 570,000 families will receive notice about their child's secondary school acceptance. As the recession forces more parents to consider a state education rather than a private one for their children, more than a third of local authorities have noted rises in the number of applications for secondary school places. This year, just 62 percent of children in Richmond-upon-Thames got into their parents' first-choice school, down from 64 percent last year. The council said this was caused by an increase in applications. In another London authority, Tower Hamlet, 71.1 percent of children were admitted to their parents' first choice school. In Leeds and Warwickshire, 85 percent were successful. In Derby the figure was 81 percent, while in Wiltshire, Stockport and Lincolnshire, the figure was 89 percent. In many authorities, the figures are similar to those of last year. Exceptions include Brighton and Hove, which introduced a lottery system to allocate oversubscribed places last year. This year, it has seen a 3.5 percent increase in the number of children obtaining their first choice, bringing the total to nearly 88 percent. However, more than 5 percent of children in this area have been allocated a place at a school that was not among any of their choices. Lotteries are being used at the government's suggestion by a small number of oversubscribed schools in around twenty-five local authorities. They were meant to prevent middle-class parents from abusing the system by buying or renting homes close to the best schools.
Question: According to the passage, more and more parents in Britain prefer to send their children to _ .
Options: (A) a state school (B) a private school (C) a school in London (D) a school in Brighton
Example Output:
A