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: It was originally built to defend an empire ,but now parts of the Great Wall of China are crumbling so badly they need someone to hurry to their defense. About 2,000 kilometers, or 30%,of the ancient fortification built in the Ming Dynasty has disappeared due to natural and human damage, according to the Beijing Times. And the situation could worsen, experts are warning as not enough is being done to preserve what remains. "It's a great pity to witness the Great Wall in such terrible situation ," Mei Jingtian, a volunteer who has worked for three decades to safeguard the structure and has founded the Great Wall Protection Association, tells CNN. About 8,000 kilometers of the structure dates from the Ming period between the 14th and 17th centuries and is considered by some to be the original Great Wall.Of this, 2,000 kilometers is made up of naturally occurring earthworks - and so only 6,000 kilometers of actual Ming dynasty wall was ever built. Stretches built in other eras make up a total length estimated up to 21,000 kilometers. Many visitors to china associate the Great Wall with a widely restored stretch of Ming era wall at Badaling near Beijing, but this is far from typical of most of the structure. According to a 2014 survey done by the Great Wall of China Society, only about 8.2% of the Great Wall is in good condition, with74. 1% classified as poorly preserved, "The Great Wall is a vast heritage site - over 20,000 kilometers - thus increasing the difficulty in preservation and restoration," Dong Yaohui, deputy director of the Great Wall of China Society, tells CNN. "Reliance on a very small amount of manpower by the local heritage departments is not enough to guard and protect the site." A recent increase in interest from tourists in visiting wild sections, known as the "Wild Great Wall," has Accelerated its deterioration ,according to the report.
Question: The present situation of the Great Wall is not optimistic due to the following reasons EXCEPT _ .
Options: (A) natural and human damage (B) limited preservation (C) booming tourists visiting (D) wars between countries
Asnwer: D
Yes

Article: I must have been about fourteen then, and I put away the incident from my mind with the easy carelessness of youth. But the words, Carl Walter spoke that day, came back to me years later, and ever since have been of great value to me. Carl Walter was my piano teacher. During one of my lessons he asked how much practicing I was doing. I said three or four hours a day. "Do you practice , an hour at a time?" "I try to." "Well, don't," he exclaimed. "When you grow up, time won't come in long stretches. Practice in minutes, whenever you can find them five or ten before school, after lunch, between household tasks. Spread the practice through the day, and piano-playing will become a part of your life." When I was teaching at Columbia, I wanted to write, but class periods, theme-reading, and committee meetings filled my days and evenings. For two years I got practically nothing down on paper, and my excuse was that I had no time. Then I remembered what Carl Walter had said. During the next week I conducted an experiment. Whenever I had five minutes unoccupied, I sat down and wrote a hundred words or so. To my astonishment, at the end of the week I had a rather large manuscript ready for revision, later on I wrote novels by the same piecemeal method. Though my teaching schedule had become heavier than ever, in every day there were idle moments which could be caught and put to use. I even took up piano--playing again, finding that the small intervals of the day provided sufficient time for both writing and piano practice. There is an important trick in this time--using formula: you must get into your work quickly. If you have but five minutes for writing, you can't afford to waste four chewing your pencil. You must make your mental preparations beforehand, and concentrate on your task almost instantly when the time comes. Fortunately, rapid concentration is easier than most of us realize. I admit I have never learnt how to let go easily at the end of the five or ten minutes. But life can be counted on to supply interruptions. Carl Walter has had a tremendous influence on my life. To him I owe the discovery that even very short periods of time add up to all useful hours I need, if I plunge in without delay.
Question: Which of the following statements is true?
Options: (A) The writer didn't completely take the teacher's words to heart at first. (B) Carl Walter has had a great influence on the writer's life since he became a student. (C) The writer owes great thanks to his teacher for teaching him to work in long stretches. (D) Rapid concentration is actually more difficult than most people imagine.
Asnwer: A
Yes

Article: Robert had just moved into the street and he felt strange that he was not wanted. He knew that perhaps the other boy students were trying to get an idea of what kind of a boy he was. This did not help to make him less lonely. He was new and he had to be tested. Still, proving himself would not be all that easy. He did not want to run with bad boys or get into something against the law to prove that he was strong. No! He must show what he was made of in a more helpful way. That would be better when he got the idea. The next day was Saturday. He knew that most of the boys would be down on the playground and choose up sides for the Saturday game. Robert knew he could play well and that just might be enough to prove he was strong and to make friends with them. He arrived early and did his step exercises. He shot the ball several times and did some other exercises--the most difficult and most wonderful in basketball. Then the boys came. Robert went through what he had done before the game and showed what he could do. No one said a word. The boys just looked at each other and thought about it. In the end, when it was all over, the biggest of the group just smiled and shook his head. Robert knew he had made it.
Question: When did Robert decide to prove himself by playing basketball?
Options: (A) After he had thought about the two wrong ways. (B) Long before he moved into the street. (C) When the other boys came down to the playground. (D) As soon as he showed what he was made of in front of the other boys.
Asnwer: A
Yes