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.
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Question: Article: Let's pretend we're sailing down the Rhine River on a pleasure boat. The Rhine is one of the main waterways of Germany, and the river traffic is heavy. It's interesting to watch the many boats going up and down the river. But the river traffic is not nearly so interesting as the beautiful scenery along the banks and hillsides. The boat is passing many old castles. We can see people working in the vineyards on the hillsides. There are vineyards as far as the eye can see. Wine from the Rhine Valley is famous all over the world. Suddenly our boat slows down and begins to turn a little. We are coming to a sharp bend in the river. On our right we can see a rocky cliff over 400 feet high. At first it looks quite ordinary, but there is nothing ordinary about it. There are many stories, poems, and songs about the cliff. We are looking at the Lorelei. Then someone on the boat begins to sing in German, the song of the Lorelei. It is a song about a beautiful siren who has lured many sailors to their deaths. The siren is supposed to sit on the rock combing her long golden hair and singing. The sailors who hear her forget to steer , and the current of river hurls their boats on the rocks and dashes them to pieces. Soon other people on the boat begin to sing. The beautiful song adds to special magic to the moment, and you begin to realize why so many people have made this trip down the Rhine to see the rock of the Lorelei.
Question: The most interesting thing to those who are sailing down the Rhine River on a pleasure boat is _ .
Options: (A) to watch many boats going up and down the river (B) to see the beautiful scene along the banks and hillsides (C) to hear a song about beautiful siren (D) to see a beautiful siren combing her golden hair

Answer: B

Question: Article: The Internet has become a part of our everyday life and there is nothing we can do without it.It is a means of communication as well as a good way of relieving and having fun.No matter in what place of the world,the Internet is the same for every one of us. If we hope to improve our knowledge or look for a certain piece of information, the Internet is the perfect tool for our need.If we do not have the time to shop, ordering online is the solution to our problem.The Internet is very useful to most people. There is no doubt that the Internet also has some bad points.I'm speaking about the harmful information,which may come up in the most unexpected paces.You can sometimes come across violence,presented to the public as a very normal way of expressing beliefs.An intelligent person will always be able to tell apart right and wrong, but what can we do to help the teenagers and children? This sort of information is a cause of many of the violent incidents in schools. There are few organization that monitor the Internet and the information on it.They cannot possibly get rid of all the bad things on the Internet. So should the Internet be censored for the protection of children? My belief is that parents are the ones who should be to blame for what their children ale doing on the Internet.
Question: The disadvantage of the Internet mentioned in the passage is that _ .
Options: (A) people spend too much time on it. (B) people rely too much on it. (C) it can provide harmful information. (D) many people use it to do things that ale not legal

Answer: C

Question: Article: Mozilla has shown off a prototype for a $25 (PS15) smart phone that is aimed at the developing world. The company, which is famed mostly for its Firefox browser , has partnered with the Chinese low-cost chip maker Spreadtrum. While not as powerful as more expensive models, the phone will run apps and make use of mobile internet. It would appeal to the sorts of people who currently buy cheap "feature" phones, analysts said. Feature phones are highly popular in the developing world as a halfway point between "dumb" phones --- just voice calls and other basic functions --- and fully-developed smart phones. Mozilla hopes that it will take an early lead in a market that is now being targeted by mobile phone producers who see the developing world as the remaining area for massive growth. It will face fierce competition from bigger, more popular brands, however --- with more announcements of this kind expected over the course of the next couple of days at the Mobile World Congress in Barcelona. "These solutions expand the global accessibility of open web smart phones to first-time and entry-level smart phone buyers by reducing the time and cost required for handset makers to bring these phones to market," said Spreadtrum in a press statement. Mozilla said the phone "redefines" the entry-level phone market. The concept of a cheap smart phone may seem likely to appeal to consumers in developed countries, particularly those who locked into long contracts in order to pay part of the cost of the likes of the Apple iPhone and Samsung Galaxy range. But analyst Carolina Milanesi, from Kantar World panel, said it should not be seen as a competitor.
Question: Which of the following is true about the $25 smart phone?
Options: (A) It has all the functions of an iPhone. (B) It is specially designed for the developed world. (C) It will attract the present "feature" phone users. (D) It is made by the Chinese low-cost chip maker Spreadtrum.

Answer:
C