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: Heavy rains have caused disasters across China this summer, bringing the worst landslides in decades. The most deadly disaster happened on August 8 when a big landslide hit Zhouqu County in Gansu province, killing at least 1,407 people. On August 18, landslides hit Gongshan, a town in northwestern Yunnan. At least 38 people were killed and 54 are missing. Heavy rains also caused landslides in several counties in Sichuan province. People were forced to evacuate to safe places. Landslides and devastation Landslides take place when dirt and rocks slide down a slope together. Sometimes these landslides are small, and hardly noticeable. Other times however, they can be massive, involving the entire side of a mountain. Landslides can be caused by a number of different things. Often rain, which adds weight to the side of a slope, can cause one. Other times they might be caused by erosion .When a stream slowly removes the base of a slope, it weakens the entire side of the mountain. As a slide moves down a mountain slope, it can pick up great speed and energy. Some slides travel at a speed of 300km an hour. The resulting winds can be so powerful that they are known to strip the leaves off surrounding trees. Earthquakes and landslides Some experts think the landslides in Sichuan were related to the magnitude-8.0 Wenchuan earthquake on May 12, 2008. The quake has caused a change in the structure of the Earth's surface, making it more likely that land will slide in the rain, according to geologist Xu Qiang of the Chengdu University of Technology. Landslides pose threats to 140 cities and towns in the country, one quarter of which are in Sichuan, said Wei Fangqiang, a researcher with the Chinese Academy of Sciences. Landslide prevention If you want to avoid being a landslide victim, the easiest thing to do is avoid living on slopes or close to mountains. If you live in a landslide-threatened area, try not to water the slopes if possible. If there are large rocks on the slopes above your house, remove them so that they don't cause damage if they fall. It might also be helpful to plant trees on the slopes. Over time, the tree roots may make the soil firmer.
Question: The landslides around China are mentioned at the beginning of the article to _ .
Options: (A) warn travelers to keep away from those places (B) show that the environment in China is getting worse (C) introduce the topic of landslides (D) express concern for those affected by landslides
Example Output: C

Example Input: Article: A small, white envelope has peeked through the branches of our Christmas tree for the past 10 years. It has no name, no identification, no inscription . My husband Mike hated Christmas. He hated the overspending and the crazy running around at the last minute for the gifts given in desperation because you couldn't think of anything else. So one year I searched for something special to give Mike. The inspiration came in an unusual way. Our son Kevin was 12 and was on the school wrestling team. Shortly before Christmas, there was a non-league match against a team of poor kids. They were dressed in ragged sneakers, and presented a sharp contrast to our boys in their golden uniforms and sparkling new wrestling shoes. As the match began, I was alarmed to see that the other team was wrestling without helmets . Their team obviously could not afford them. We beat them hands down . Mike shook his head sadly. "I wish just one of them could have won," he said. Mike loved kids and enjoyed coaching football and baseball. That's when the idea for his present came. That afternoon, I went to a sports store and bought a load of wrestling headgear and shoes. I sent them anonymously to the poor team. On Christmas Eve, I placed a small, white envelope on the tree, the note inside telling Mike what I had done and that this was his gift from me. Mike's smile was the brightest thing about Christmas that year. In the years that followed, I sent a group of mentally handicapped youngsters to a hockey game, and a check to a pair of elderly brothers whose home had burned to the ground the week before Christmas. The white envelope became the highlight of Christmas. Mike died last year, but on Christmas Eve I still placed an envelope on the tree. The next morning it was joined by three more. Each of our three children had placed a white envelope on the tree for their dad. Mike's spirit, like the Christmas spirit, will always be with us. By Nancy W. Gavin
Question: Why did Mike hate Christmas?
Options: (A) He found each Christmas was just the same as another. (B) He felt Christmas was ruined by constantly having to rush around. (C) He couldn't see the point in exchanging expensive gifts. (D) He felt the Christmas spirit was lost in commercialized gift buying.
Example Output: D

Example Input: Article: When Kathryn was 6 years old, she sat outside for three hours at her home and did not make a sound.Her parents wondered why she was so quiet, only to discover that she was drawing a picture of a flag outside. She recalled. "That's what I wanted to do that day," said Kathryn, who is now 23 years old. And in the future, she continued to do art as a hobby. Recently, Kathryn was named Lake Placid's first artist in the neighborhood. She will be there for at least four weeks and possibly more. During that time, she will teach an art class and focus on her own art. Much of her work includes creating photos. She said: "There is always something there that you haven't included, so you can never stop when painting a photo." Kathryn ended up as the first artist just by chance. She said her sister was on vacation in Florida and looking for a job in Lake Placid. The sister got the job and moved there. Kathryn said she visited her sister and was ordered to do wall paintings inside a building. Later, her sister saw a demand for an artist on line and suggested she should apply. Kathryn said she's the first artist in her family, but added that her parents are creative. Her father loves to create things from wood, she said. "Anything you can make out of wood, he has made it," she said. Her own creativity with art continued through college. While at college, she was once employed to recreate a photo of a couple on a vacation to Florida and one of a sunset in either North Carolina or South Carolina. Kathryn said she's looking at other forms of art. The time she spends here will help her to "figure out who I am as an artist," she said.
Question: While painting a photo, Kathryn thinks _ .
Options: (A) It's hard to finish a perfect job. (B) you can't stop half way (C) you may miss the photos somewhere (D) you have to finish it at a time
Example Output:
A