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.

Ex Input:
Article: Two thieves came to a house to steal something. They dug a hole in the wall of the house. There lived many mice in the house. The woman in the house saw a mouse crawl into the house in the moonlight. "Look! In comes one," she said to the man in the house. The thief was so frightened that he hurriedly crawled out of the house and said to the one waiting outside, "She found me when I was just in." But the thief outside didn't believe him, so he said, "Let us try to crawl into the house together." At that time two mice happened to crawl into the house, too. The woman saw the mice and shouted, "In come two, catch them!" The two thieves were terribly frightened. The man in the house said, "You saw them come in but where are they? I will catch them tonight." The two thieves started running away at once. The two thieves wanted to make it clear whether they had been found or not the night before. The next day they acted as men selling sweet potatoes and came before the house. The man and the woman were ploughing in their fields. The rope broke and the woman came home for a rope. She saw two men selling sweet potatoes and wanted to buy some. She picked out two which looked like mice. At the time the man couldn't wait for her any longer in the fields and he ran back from the fields to hurry her up. The woman showed the sweet potatoes to the man and said, "How they look like the two of last night." The man said, "I asked you to fetch a rope, why don't you hurry for it?" The two thieves ran away very quickly without their sweet potatoes.
Question: The two thieves failed to steal anything from the house because _ .
Options: (A) they were found out (B) they were frightened by what they had heard in the house (C) they didn't work together well with each other (D) mice stopped them from doing so

Ex Output:
B

Ex Input:
Article: Three astronauts returned to Earth safely on Wednesday after a successful 15-day mission , marking another step forward towards the country's goal of building a manned space station by 2020. Zhang Youxia, commander-in-chief of China's manned space program, said the Shenzhou X mission was a "complete success". The Shenzhou X landed safely in north China's Inner Mongolia Autonomous Region at about 8:07 a.m. on June 26, 2013. All three astronauts were in good physical condition. Nie Haisheng, commander of the Shenzhou X crew and a second-time space traveler, was the first to get out of the bowl-like module , followed by Wang Yaping, the only female astronaut of the mission, and Zhang Xiaoguang. During a brief welcoming ceremony held at the landing area, the astronauts waved happily to a crowd consisting of officers, the search and recovery team, and health personnel. "It feels really good to be back home," said astronaut Nie Haisheng. "We are dreamers, and we have now realized our dream," said Zhang Xiaoguang. "Our space dream knows no limit, and our hard work will never stop," he said. Compared with its previous mission Shenzhou IX last year, the Shenzhou X is no longer experimental but considered an applicable shuttle system for sending astronauts and supplies to orbiting modules. The mission aims to further test technologies designed for docking and supporting astronauts' stay in space, as well as to use new technologies related to the construction of a space station. In its 15-day journey in space, Shenzhou X docked with the orbiting space lab Tiangong-1 twice, once through automatic operation and the other manual .The Tiangong-1 space lab has been in orbit for more than 600 days. It's designed to work for two years. The module is considered the first step in building a permanent space station in the future. And the astronauts spent 12 days in Tiangong-1, where they conducted space medical experiments, technical tests and gave a science lesson to students on Earth on June 19 about basic physics principles. The lecture was the second video class sent from space, with US astronaut Barbara Morgan's 25-minute class being the first in 2007. China is the third country after the United States and Russia to acquire the technologies and skills necessary for space rendezvous and docking procedures, as well as supply manpower and material for an orbiting module via different docking methods. Previous docking procedures conducted between Shenzhou-type spacecraft and the orbiting space lab included two automated dockings by the unmanned Shenzhou-8 in 2011 and both an automated and manual docking by the manned Shenzhou-9 in 2012. Since its first manned space space mission in 2003, China has sent ten astronauts and six spacecrafts into the space.
Question: According to the passage, the Shenzhou X _ .
Options: (A) was sent into space on June 11, 2013 (B) is still an experimental shuttle system (C) sent many supplies to the manned space station (D) returned to Earth safely on the afternoon of June 26

Ex Output:
A

Ex Input:
Article: It's a warm summer afternoon. You're cooking up the catch of the day over a campfire. Suddenly, a few raindrops fall on your arms, and before you know it, the sky is opened up. Then you hear what sounds like thunder in the distance. What should you do? Your tent is close by and would offer shelter from the pouring rain. There's a campsite picnic shelter a few minutes down the path. And then you remember that your car is parked down the road. What's your safest choice to make sure you and your families are safe? It's a common question for many hikers and campers, especially when they are camping during summer months. Heading to your car is almost always the safest choice. Your tent and a picnic shelter will keep you dry, but they offer little or no protection against lightening. Your car, on the other hand, will keep you dry and protect you from lightening strikes. Protecting yourself against possible lightening strikes is very important; lightening kills an average of 62 people in the US each year. If you keep all of the windows and doors closed in your car, you'll be able to return to your campsite safely. Of course, if you're backpacking , not car camping, and you're deep in the woods, your car won't be a good choice. So, what should you do if your car is far away and there's no other safe shelter nearby? First, you'll have to make sure that tree limbs or other objects don't fall on you or your campsite. Then you'll have to get in a safe position to avoid lightening, or flash flood conditions. What else should you do?
Question: The passage aims to tell us _ .
Options: (A) what's camping (B) how to camp safely (C) car camping is the safest way when camping (D) how to survive a storm when camping

Ex Output:
D