In this task, you're given an article, a question which often contains a blank, four options (associated with "A", "B", "C", "D") and the answer to that question. Your task is to classify whether the given answer is correct or not by providing "Yes" or "No", based on the article.

[EX Q]: Article: Imagine you are standing on the 70thfloor of the Empire State Building, staring at the cityscape. Suddenly a man pushes past you, opens the window and announces his intention to jump. You yell out, "Stop! Don't do it!" the six-foot-five figure turns to you and menacingly says, "Try to stop me and I'll take you with me!" "Umm... No problem, sir. have a good trip. any last words?" "Let me tell you my troubles," he says, "my wife left me, my kids won't talk to me, I lost my job and my pet turtle died, so why should I go on living?" Suddenly you have a flash of inspiration. "Sir, close your eyes for a minute and imagine that you are blind. No colors, no sights of children playing, no fields of flowers, no sunset. Now imagine that suddenly there's a miracle. You open your eyes and your vision is restored! Are you going to jump? Or will you stick around for a week to enjoy the sights?" "I'll stay for a week." "But what happened to all the troubles?" "I guess they're not so bad. I can see!" " _ " If you really appreciate your eyesight, the other pains are insignificant. But if you take it all for granted, then nothing in life will ever truly give you joy. Actually, there are misconceptions on the road to happiness. misconception1: "Once I know the tools for being happy, then it will work like magic." Don't expect the results to come automatically. It is possible to understand how to achieve happiness, yet not put it into practice. In fact, many people actually prefer to be comfortable and unhappy, rather than bear the discomfort of changing their habits. Just as learning any new skill requires effort, you have to be willing to invest serious effort to achieve real happiness. Misconception 2: "if I become content and satisfied with what I have, I'll lose my motivation to achieve more." Now ask someone who is depressed, "Let's go fishing!" "I'm tired. Maybe tomorrow. And anyway, I might rain..." in reality, happy people are energetic and ambitious. There's never enough time to do everything they want to do. Misconception 3: A beautiful Sunday afternoon, you're in the park having a picnic with friends. Suddenly one person complains: "who forgot the forks? It's too hot for volleyball. I want to go home already." When our mood negatively affects others, we recognize we have duty to be happy and not spoil the fun. But what about when we're at home with our family? Or when we go into the office on Monday morning? like an open pit in the middle of the road, a sourpuss is a public danger. Being happy is part of being considerate to the people around us.
Question: The story is placed at the beginning of the passage in order to _ .
Options: (A) tell a skill of persuasion (B) warn the danger of standing on a tall building (C) emphasize the importance of eyesight (D) introduce the theme of the passage
Asnwer: D
[EX A]: Yes

[EX Q]: Article: This morning, a Virgin Atantin 747 Jumbo Jet became the first commercial airplane to fly on biofuel. The short flight from London to Amsterdam used a blend of 20% babassu oil mixed with 80% conventional jet fuel. What was really exciting about the flight was the fact that the engine did not have to be altered in any way for the biofuel to work While this is a great initial step in trying to reduce CO2(carbon-dioxide)emissions from airplanes. there are a lot of hurdles that still need to be overcome. First and foremost, unlike the normal fuel used to run airplanes (known as Jet A),biofuel freezes at high altitudes. Also, Jet'A'fuel burns consistently (at the same pace),which means it provides a safe and reliable fuel for long flights--engineers are not sure if biofuel will be able to do the same. The biggest hurdle to a full biofuel switch is our ability to be able to grow enough crops that can be converted to biofuel. There are two concerns that scientists have in this matter - the first is that the land to grow the extra crops will come from clearing more of our forests and the second is that since it competes with what we eat, the price of food will go up. However, Richard Branson of Virgin Airlines, envisions that if biofuel starts to replace oil on a greater basis, it will be manufactured from algae produced in sewage treatment plants, not from food sources. Birgin Airlines is not the only one trying to look for alternative fuel sources. Earlier this year, an Airbus A380 used another alternative fuel-a man-made mix of gas-to-liquid, in one of its four engines. The flight was tested by Rolls Royce (manufacturer of jet engines), in partnership with Shell (an oil company). Rolls Royce is also working with Air New Zealand on a similar project. While a complete switch to alternative fuel may take years, it is very encouraging to see airlines, oil companies and airplane manufacturers all coming together to try to make it happen!
Question: .Why does Virgin Airlines try to replace normal fuel with biofuel?
Options: (A) To cut down the flight cost of the company. (B) To remove some hurdles for the biofuel to work. (C) To reduce CO
2 emissions from airplanes. (D) To test plane engines on biofuel.
Asnwer: D
[EX A]: No

[EX Q]: Article: Contestants from around the world met in Pomona, California, this month to test their skills at things like driving a car, walking down stairs, and opening doors. Sounds easy, right? But the competitors weren't people--they were robots! The bots were participating in the final round of the US's DARPA(Defense Advanced Research Projects Agency) Robotics Challenge. This event, which took place on June 5-6, tested robots on how well they could respond during a disaster and the winning team finally took home a $2 million grand prize. The DARPA challenge was created after the 2011 Fukushima nuclear disaster in Japan. An earthquake caused a tsunami, which damaged a nuclear power plant. Workers at the plant needed to shut off an important valve , but it was too dangerous for humans to reach it. The US scientists at DARPA wondered whether the disaster could have been avoided if a robot had been sent to do _ . So they set up the robotics competition. Turning a valve was just one task a robot might have to perform when entering a disaster zone. In addition to doing this, robots participating in the challenge had to navigate a course containing several other tasks: driving and exiting a vehicle, opening a door, walking over or clearing objects, cutting a hole in a wall, plus climbing a flight of stairs. Teams had to complete the challenge in one hour, and points were awarded based on how quickly the robots completed a task. They didn't have to attempt all the tasks. To make things even more realistic, challenge organizers caused short computer-system blackouts that prevented robots and the human operators controlling them from communicating. That means teams had to program their robots to be partially autonomous . Robots also couldn't be attached to anything that could keep them from falling down, which happened a lot.
Question: What do we know about this year's DARPA challenge?
Options: (A) It lasted five days. (B) It was held in Japan. (C) Its winner got a cash prize. (D) Its winner will work in Fukushima.
Asnwer: C
[EX A]:
Yes