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 Q]: Article: A ban on smoking in public places has come into effect on May 1,2011 in China--home to one third of the world's smokers. The ban is aimed at controlling the number of deaths from smoking-related diseases, running at a million deaths a year.That figure is predicted to double by 2020.The new smoking ban is an attempt to prevent that prediction coming true. The new rules forbid people from smoking in places like hotels, railway stations or theatres, but not including the office.Employers can warn their staff of the dangers of smoking but cannot forbid them from smoking at their desks. But the new rules have been criticized because they do not describe in detail the punishments for businesses or individuals who _ them.Quite many smokers do not seem to take much notice of them.Often you find people smoking at next table while you are eating your meal or having a drink in a bar.In bus stops as well as in railway stations smoking can also be seen here and there.Business owners are also angry at the efforts to force them to ban smoking on their premises , because many customers refuse to go to restaurants or places of entertainment where smoking is forbidden. It appears that many Chinese people are unaware of the dangers of smoking.Research suggests that only one in four knows the harm cigarettes can cause.Officials say they have to try to persuade people not to smoke to try to reduce the numbers dying from smoking-related diseases.At the same time, however, the local governments make a lot of money from the sales of cigarettes by the state-owned firm that makes and sells tobacco products throughout the country.
Question: From May 1, 2011, it is forbidden to smoke _ .
Options: (A) at the restaurant (B) in the car (C) in the office (D) in any places
[EX A]: A

[EX Q]: Article: Last week, I bought an alarm system for about $ 450. It consisted of a control unit with three other small units. I put the control unit in the sitting room and fastened the other units by the front door, back door and living-room windows. The instructions told us to choose three numbers, so we chose 491, the last three numbers of our telephone number. Now I must explain how the alarm works: 1. There is a power siren in the control unit. It makes a very loud noise. 2. Each of the small units sends out beams or rays in different directions. If anything moves, it breaks a beam. This sends a signal to the control unit. The siren makes a noise that you can hear 50 meters away. 3. When we go to bed, I press the three buttons numbered 4, 9 and 1. Then we have 30 seconds to get out of the room before the alarm starts to work. That might I slept soundly because I was sure that no burglar could get into our house. However, at about 2:10a.m., I woke up and heard the siren . "There must be a burglar in the house," Mary said. "What shall we do?" "I'll go and see who's there," I said. "Stay here. Don't make a noise." I went downstairs quietly. When I reached the living room, I switched on my torch and looked round the room. Then I turned the light on. I switched the siren off and searched the rooms downstairs. There was nothing wrong except that the back door was unlocked. I locked it, re-set the alarm and went back to bed. About an hour later, the alarm started again. I jumped out of bed, fell over a chair in the dark and bumped into the bedroom door. Mary woke up and started hitting me with a torch. "Hey! Wait a minute!" I whispered. "It's only me. I' m going downstairs to see what's wrong." I went down into the living room and listened for a moment. The only sound I could hear was the siren. I turned on the light and then switched the siren off. As I did so, I glanced across at the curtains in front of the windows. I saw a house lizard disappear behind the curtains. "Oh!" I said to myself. "That's our burglar." When the lizard moved, it started the siren. I guessed that the alarm had been made in Europe, where there are no house lizards. Well, I won't finish this story but if you want an alarm system free of charge, let me know. I'll send you ours. We bought a dog this morning. It knows the difference between a lizard and a burglar.
Question: The writer bought an alarm system to _ .
Options: (A) make sure that he got up early every day (B) warn him when there were lizards in his house (C) frighten burglars and tell him that somebody had got into the house (D) make Mary feel safe to live in the large room
[EX A]: C

[EX Q]: Article: People hold different views on what or how much homework should be. It is partly due to the fact that people can't seem to agree on the purpose of homework. Some teachers think that homework is necessary to reinforce what is learned in school. And so they ask their students to memorize what was discussed in class through homework. Some teachers think the point of homework is to cover material that the class didn't have time to get to, so their homework is to let students learn additional things. Other teachers like homework simply because they want students to form work habits and still others believe homework is necessary because it's the best way for parents to learn what their children do in school. However, many parents seem to have different ideas. Elisa Cohen, who has twins at Lafayette Elementary School, doesn't like the fact that third-grade students in DC elementary schools are asked to write about 25 book summaries a year. She said, "They do the same thing over and over without really getting into alternate ways of thinking about books, reading and writing." Some education reformers , such as Howard Gardner, a Harvard University professor well-known for his theory on multiple intelligence, think that Cohen is on the right track. But it's often hard to persuade overworked teachers to give much thought to homework tasks.
Question: How many opinions do the teachers have on "homework"?
Options: (A) 3. (B) 4. (C) 5. (D) 6.
[EX A]:
B