instruction:
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.
question:
Article: Millions of people will be able to track each and every move by friends and family through their mobile phones,thanks to a new feature launched by Google yesterday. The new system named "Latitude" uses a map to show exactly where a loved one is at any time, sometimes discovering their location to a few meters.Worried parents will be able to check up on where their children have got to after school, friends can meet for a quick drink if they see they are nearby and wives will be able to see if their husbands really are working late at the office. The feature was made available immediately on millions of mobile phones that can access the web,such as the BlackBerry.Within weeks Google hopes to launch a new one that wilt also work on computers as well. "Once you've shared your location,you can hide it from all of your friends at once,or you can turn off Google Latitude completely at any time." said a Google spokesman."You can adjust your privacy settings in Latitude so that you share as much or as little about your location as you want,with whom you want." Google said that the company had tested the product with thousands of people to make sure that it was safe for the customers,but experts were not so sure.Simon Davies,director of Privacy International,said Latitude would open up a "privacy minefield ". "It's about the little white lies.You might be avoiding going to work, and now your boss might be able to see that you're at Twickenham instead of at home."said Ian Angell, an information expert at the London School of Economics."You've already got mobile phone technology where husbands and wives track each other in secret.Now Google is so widely used that it will only worsen the situation."
Question: According to Google,the new system "Latitude" can _ .
Options: (A) prove that the partner has told a lie about working late (B) tell the parents the locations of their children after school (C) provide the friends with the most suitable pub for a drink (D) help people find what their loved ones are doing at any time
answer:
B

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Article: One summer night Ludwig Beethoven took a walk in the suburb of Bonn. Suddenly a gentle wind came. He heard some music. He listened carefully and found it was his F sonata. He followed the music and came to a small house. There through the window, he saw a girl playing a very old piano and a young man was making shoes beside her, he pushed the door open and went in. The host received him very warmly and told him that the girl was his sister, who was blind but very fond of music. They couldn't afford to send her to a master. So she was only trying to play some music she heard the neighbors play. She knew it was the work of a great composer. Beethoven was very much moved. Suddenly the candle was blown out. Moonlight struck on the girl's slender figure. Then Beethoven played music for them. He played so wonderful that the brother and sister were amazed. That was his famous Clair de lune.
Question: Beethoven heard the music because _ .
Options: (A) it was played loudly (B) there was a slight wind (C) the piano was old (D) he stopped walking
answer:
B

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Article: The latest beliefs are that the main purposes of sleep are to enable the body to rest, allowing time for repairs to take place and for tissue to be regenerated . Lack of sleep, however, can compromise the immune system, cause depression and promote anxiety. For many people, lack of sleep is rarely anything of choice. Some have problems getting to sleep, others with staying asleep until the morning. Despite popular belief that sleep is one long event, research shows that, in an average night, there are five stages of sleep. In the first light stage, the heart rate and blood pressure go down and the muscles relax. In the next two stages, sleep gets progressively deeper. In stage four, usually reached after an hour, the slumber is so deep that, if awoken, the sleeper would be confused and disorientated. It is in this state that sleep-walking can occur, lasting no more than 15 minutes. In the fifth stage, the rapid eye movement (REM) stage, the eyes move constantly beneath closed lids as if the sleeper is looking at something. During this stage, the body is almost paralysed . This REM stage is also the time when we dream.[:Z#xx#k.Com] Sleeping patterns change with age. One theory for the age-related change is that it is due to hormonal changes. The temperature rise occurs at daybreak in the young, but at three or four in the morning in the elderly. Age aside, it is estimated that roughly one in three people suffer some kind of sleep disturbance. Causes can be anything from pregnancy, smoking, and stress to alcohol and heart disease. Apart from self-help therapy such as regular exercise, there are psychological treatments, including relaxation training and therapy aimed at getting rid of pre-sleep worries and anxieties. Medication is regarded by many as a last option and often takes the form of sleeping pills.
Question: What's the best title of this passage?
Options: (A) Lack of Sleep (B) Change of Sleep (C) Patterns of Sleep (D) Benefits of Sleep
answer:
A