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.

Input: Consider Input: Article: Humans and many other mammals have unusually efficient internal temperature regulating systems that automatically maintain stable core body temperatures in cold winters and warm summers. In addition, people have developed cultural patterns and technologies that help them adjust to extremes of temperature and humidity . In very cold climates, there is a constant danger of developing hypothermia , which is a life threatening drop in core body temperature to below normal levels. The normal temperature for humans is about 37.0degC. However, differences in persons and even the time of day can cause it to be as much as 6degC higher or lower in healthy individuals. It is also normal for core body temperature to be lower in elderly people. Hypothermia begins to occur when the core body temperature drops to 34.4degC. Below 29.4degC, the body cools more rapidly because its natural temperature regulating system usually fails. The rapid decline in core body temperature is likely to result in death. However, there have been rare cases in which people have been saved after their temperatures had dropped to 13.9-15.6degC. This happened in 1999 to a Swedish woman who was trapped under an ice sheet in freezing water for 80 minutes. She was found unconscious, not breathing, and her heart had stopped beating, yet she was eventually saved despite the fact that her temperature had dropped to 13.7degC. In extremely hot climates or as a result of uncontrollable infections, core body temperatures can rise to equally dangerous levels. This is hyperthermia. Life threatening hyperthermia typically starts in humans when their temperatures rise to 40.6-41.7degC. Only a few days at this extraordinarily high temperature level is likely to result in the worsening of internal organs and death.
Question: Why can humans keep stable body temperatures in different seasons?
Options: (A) Because their bodies are unusually efficient. (B) Because they experience different climates. (C) Because they can adjust to cultural patterns and technologies. (D) Because they have internal temperature regulating systems.

Output: D

Input: Consider Input: Article: A long weekend is a great opportunity to do something a little different. Many people use a long weekend for a getaway, a short trip to leave the stress of their everyday lives behind and explore, learn, or relax. Hotel Romance Many hotels and resorts feature something special to start the getaway, such as champagnes , flowers, or a fruit basket in the room on arrival. Getaway packages usually include a room with something special, a heart shaped bed, for example. Additional benefits could be room service meals or other private dining, plus tickets or discounts for local attractions. Visit a Spa Spa getaways can take place at a location that focuses only on spa services or at a hotel that offers a spa as one of its features. Some spas emphasize treatments fit for their geographic area or a local attraction. A spa in a grape growing region might provide grape juice masks, or a hotel near a hot spring could offer mineral baths. Most spas offer a range of massage , health and beauty treatments, so a spa getaway can be relaxing with other benefits. Learn a Skill A long weekend may not be enough time to become an expert at something new, but it provides a way for people to begin their explorations. Some organizations offer intensive courses that last two or three days. People with special interests can get away from their routines while learning such things as how to make beer, speak a new language, or take better photos. Help Others Some organizations cooperate with businesses to have accommodations and activities for short-term volunteers. Most volunteer vacations involve ecology friendly or charity activities. A volunteer getaway is a way to relieve stress and help others at the stone time. Stay in a National Park For those who want to relax in a rural environment, a national park fits the bill. Most national parks provide camping areas for tents and trailers. Several have cabins within the parks available to rent. A getaway to a national park provides privacy, stress relief, and the time to get to know some important natural resources.
Question: It can be learned from the text that _ .
Options: (A) spas are offered in the tourist attractions all over the country (B) intensive courses of some organizations help people get away from home (C) helping others at weekend makes people feel more stressful (D) people may get close to nature in a national park

Output: D

Input: Consider Input: Article: Christine and Elena grew up in the same suburb of Sydney and first met at kindergarten. They took to each other immediately and became inseparable friends throughout their school lives. Elena's parents had moved from Greece to Australia, and her grandparents still lived on the small Greek island of Santorini, When she was 16, Elena visited her grandparents for the first time. On returning to Australia, she talked endlessly about her grandmother's next-door neighbor, Mara. When Christine expressed puzzlement at Elena's obsession with people next door, Elena admitted that Maria had a handsome son called Nicos. She showed Christine a photo of him, standing next to his prize possession, a motorbike. Elena and Nicos exchanged emails for a while, but suddenly Nicos stopped writing. While not heartbroken, Elena was nevertheless hurt. A year later, when Christine announced that she was going to visit Greece, Elena begged her to visit Santorini and say hello to Maria and Nicos. Christine agreed to do so. When she flew into Athens on an unseasonably cold day in September, she quickly realized that she hadn't brought enough warm clothes. Walking through the streets of the Greek capital, she happened to see a nice coat in a shop window and went in to ask about the price. The coat was too expensive, but as Christine was about to leave the shop, the woman asked her where she was from. When Christine answered Australia, the woman agreed to reduce the price because she knew a nice girl from Australia called Elena. Christine then noticed a photo of a young man standing next to a motorbike. Her eyes opened wide with astonishment. It was Nicos! Indeed the young man was Nicos, and the woman in the shop was Maria. She had come to Athens from Santorini to look after the shop for a friend. Sadly, the story has a tragic ending. Nicos had been killed in a motorcycle accident. "I wanted to tell Elena," said Maria. "But I didn't know how. Now that I have met you, I know that it's time to tell her."
Question: Elena went to Greece in order to visit_.
Options: (A) her grandparents (B) Christine (C) Nicos. (D) her parent
Output: A