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.

Article: Coral reefs are not just beautiful to look at,but also very useful.They shelter nearly 25% of ocean life and provide food for billions of people.However, like many other species,this amazing ecosystem is in danger of dying out! There are two main reasons for the destruction--the rising carbon dioxide levels caused by global warming as well as human influences like bottom operation.While not much can be done about the former,the loss caused by the latter can be reduced. Bottom operation involves dropping nets to the ocean bed and then dragging them up when filled with fish.This action damaged the ocean floor,causing the coral branches to separate from the reefs.While that is very discouraging,the good news is that if these branches are found quickly,they can be saved.At present,that work is being performed by volunteer divers. But the method has only limited success because they cannot stay long underwater, nor reach depths of over 200 meters where some of the deep-sea coral grows. However,this is not the case for Coralbots--the robots that can constantly seek out broken branches.A team of 'coral bots',each individually working to simple rules will piece together damaged bits of coral, allowing them to regrow. They are programmed to be able to distinguish between other things and the coral.The robots work together in groups,similar to bees.If one coralbot is damaged, then the others will still be able to complete the task. Dr Lea-Anne Henry said:"The project of using coralbots offers us the possibility to restore the function of reefs.It is in the final stage of testing.Once ready, the researchers hope to build hundreds of _ and use them effectively in the waters off Scotland and then hopefully in the oceans across the world."
Question: Which of the following is a cause of the danger that coral reefs are facing?
Options: (A) The appearance of new creatures. (B) The seriously polluted sea water. (C) The activities of volunteer divers. (D) Human activities like bottom operation.
Asnwer: D
Yes

Article: Soon after you have your first child, the question of having a second one is raised by friends and family. However, as the pattern of having two children in a family is challenged by modern family units, there are a few reasons why it is not selfish to want only one child. Today, the role of women has changed a lot. But nowadays, a wife has to help her husband earn the bread and butter as well as well as looking after her family. In demanding times like these, a woman has to put in more physical and emotional effort than any other member of the family. Raising a child comes at a cost that remains only heard of, until you find yourself paying it. The good reality of double income with no kids suddenly comes crashing down when there is a child involved in the picture. When one parent (the mother) needs to take some time off to look after the newborn, only one person becomes the earning member. Of course, the expenses went up rapidly. According to Susan Newman, PhD, a social psychologist, the average cost of raising a child is $227,000 from birth to college. Most young mothers also think that having one child would mean that there is more income for the child, and thus, better facilities can be provided. It is much easier to educate a single child at a good school, and give him/her better life with more resources at hand. With several children in the house, it becomes increasingly difficult to find ways to spend time with all of them. Dividing your time with just one child means that you can devote a little more time to doing the things you want to. In a single child unit, there are less comparison and more chances for positive motivation to learn new things. A happy child, who deserves the rightful attention, love, care, and time from both the parents, always gets a meaningful childhood, for both the parents and the child.
Question: What does the writer mainly want to tell us in the passage?
Options: (A) It is not selfish to have only one child in a family. (B) Raising a child costs a lot nowadays. (C) It is more difficult to raise several children in a family. (D) Women are playing a more important role in the family than before.
Asnwer: A
Yes

Article: Nathan's second-hand bike was good enough to get him anywhere he wanted to go. Of course, it couldn't match Tim's in a normal speed race, but all the fancy gears in the world wouldn't get you up Black Mountain. It was so steep in places that you had to get off your bike and push. On this particular afternoon, the odds were all on Nathan's side. First, he was stronger. Tim had always been thin, but recently he'd started to grow so fast that his arms and legs were like pieces of spaghetti. As well as being considerably fitter than his friend, Nathan knew the shortcuts up prefix = st1 /BlackMountain. So when Nathan accepted the challenge, he was sure he'd win. He nearly always did, in competitions with Tim. That was what was strange. Tim was so competitive, and yet he wasn't any good at physical things. By the time the two boys were three quarters of the way to the top, Nathan was clearly ahead. While the road zigzagged back and forth up the mountainside, in certain places, there were also vertical tracks, where water rushing down the slope in winter had bitten erosion courses into the soil. These had in turn been so overgrown by bushes and long grass in the spring that they looked like tunnels through the bush. The trick was to know where you could cut off a whole bend in the road by leaving the road and pushing your bike up one of these half-hidden pathways. If you chose the wrong one you'd struggle up for ten minutes and then suddenly reach a dead end. Then there was no choice but to go back.
Question: What did Tim challenge Nathan to do?
Options: (A) test who had the fastest bike (B) decide who was the most competitive (C) find the secret tracks on the mountain (D) race to the top of BlackMountain
Asnwer: D
Yes