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.

Article: While English is getting more important in our schools, Chinese has become popular among foreign kids. But Chinese can be more difficult to learn. At least 16-year-old Piao Chenglong thinks so. "English is easier for me. Chinese characters have too many strokes ," said Piao. "But I want to learn it. I want to study at Peking University when I grow up." Piao is from South Korea. He came to China in 2008. In South Korea, there are more than 300000 Chinese learners like Piao. Some South Korean students begin to learn to write the language on their first day at school. To help students learn Chinese, South Korea holds speaking competitions for high school students every year. Chinese isn't just popular in South Korea. People from all the world want to learn it. The Chinese Ministry of Education says that nearly 130 million people from 85 countries are learning Chinese. This number will be increasing to 800 million in the coming years. In America, Chinese is the second most popular foreign language after Spanish. Some American middle schools have Chinese classes. Students learn to make jiaozi and tie Chinese knots . Some even try to write and draw in Chinese way! People want to learn Chinese because China is becoming such an important country. Foreign countries want to understand China better to help them with business. The Chinese government is also helping the world learn Chinese. It has sent more than 200 Chinese teachers to more than 60 countries in the world. Many more Confucious College will be set up in the world. These colleges will teach Chinese to foreign students.
Question: Which of the following is the topic sentence for the text?
Options: (A) Chinese has become popular among foreign kids. (B) Chinese can be more difficult to learn. (C) In America, Chinese is the second most popular foreign language after Spanish. (D) Students learn to make jiaozi and tie Chinese knots.
A

Article: Trees are useful to man in three important ways: They provide him with wood and other products; they provide him shade;. and they help to prevent droughts and floods. Unfortunately, in many parts of the world, man has not realized that the third of these services is the most important.In his eagerness to make money from trees, he has cut them down in large numbers, only to find that without them he has lost the best friends he had. And besides, he is usually too careless to plant and look after new trees. So the forests slowly disappear. This does not only mean that man will have fewer trees. The results are even more serious: for where there are trees, their roots break up soil allowing the rain to sink in and also bind the soil, thus preventing it from being washed away easily;but where there are no trees, the rain falls on hard ground and flows away, causing floods and carrying away the rich top-soil. When the top-soil is gone, nothing remains but worthless desert. Two thousand years ago,a rich and powerful country cut down its trees to build warships, with which to gain itself an empire .It set up the empire, but, without its trees, its soil became poor and grew weak. When the empire fell to pieces, the home country found itself faced by floods and starvation .
Question: The most important service of trees to man is that _ .
Options: (A) they give them wood and other products (B) they give them shade (C) they help him prevent droughts and floods (D) they help him made money
C

Article: When someone gives you advice, listen without judgment, try to find value in what you're hearing, and say: "Thank you". This wise advice is easy to understand yet hard to practice. I'll give you an example from my life when I totally _ in terms of practicing what I teach. In my work I travel constantly. I always put off going to the airport until the last second. My wife, Lyda, was sitting next to me in the front seat. I was racing along and not paying much attention. Lyda cried out: "Look out! There is a red light up ahead. " Being a trained behavioral science professional--who teaches others the value of encouraging advice--I naturally screamed at her: "I know there is a red light up ahead! Don't you think I can see?" When we arrived at the airport, Lyda didn't speak to me. I wondered why she seemed mad at me. During the flight to prefix = st1 /New York, I did a cost-benefit analysis. I asked myself: "What was the cost of just listening when Lyda called out the warning? Zero." I then reasoned: "What was the potential benefit? What could have been saved?" Several potential benefits came to mind, including her life, my life, and the lives of other people. I landed in New Yorkfeeling ashamed of myself. I immediately called Lyda and told her my cost-benefit story. I convinced her: "The next time you help me with my driving, I am just going to say, 'Thank you.'" A few months passed, and I had long forgotten the incident. Again, I was racing off to the airport, when Lyda cried out: "Look out for the red light!" I was embarrassed, and then shouted: "Thank you!" I'm a long way from perfect, but I'm getting better. My suggestion is that you get in the habit of asking the important people in your life how you can do things better. And be ready for an answer. Some people may tell you things like "Look out for the red light." When this happens, remember that there is possibly some potential benefit. Then just say: "Thank you."
Question: What do we know about the author?
Options: (A) He is expert at behavioral science. (B) He is gifted in cost-benefit analysis. (C) He seldom takes his wife's advice. (D) He often runs the red traffic light.
A