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.

Input: Consider Input: Article: Computer power is moving into the "cloud"--networks of data centres that use the Internet to supply all kinds of services, from e-mail and social networks to data storage and analysis. The rise of cloud computing is rapid and causing huge changes in the tech industry. The old guard is suffering: this week's $67 billion merger between Dell and EMC, makers of computers and storage devices respectively , was a marriage forced by the rise of the cloud. Disruptive newcomers are blooming: if Amazon's cloud-computing unit were a stand-alone public company, it would probably be worth almost as much as Dell and EMC combined. The gains for customers have been equally dramatic. Compared with older IT systems, cloud computing is often much cheaper. It adds tremendous flexibility: firms that need more computing capacity no longer have to spend weeks adding new servers and installing software. In the cloud they can get hold of it in minutes. Their applications can be updated continually, rather than just every few months. Individual users can reach their e-mails, files and photos from any device. And cloud services also tend to be more secure, since providers know better than their customers how to protect their computing systems against hackers. But cloud computing makes one problem worse. In the old IT world, once a firm or a consumer had decided on an operating system or database, it was difficult and costly to switch to another. In the cloud this "lock-in" is even worse. Cloud providers go to great lengths to make it easy to upload data. They accumulate huge amounts of complex information, which cannot easily be moved to an alternative provider. Cloud firms also create a world of interconnected services, software and devices, which is convenient but only for as long as you don't venture outside their universe. Being locked in to a provider is risky. Firms can start to tighten the screws by increasing prices. If a cloud provider goes bust , its customers may have trouble getting back their data. These risks have already caused a debate about whether the cloud needs stricter regulation. Some European politicians want to force cloud providers to ensure that data can be moved between them. That is too heavy-handed, because strict rules will inhibit innovation in what is still a young industry. The history of computing suggests that common standards may well appear naturally in response to customers' demands--just as in personal computers, where it is now much easier to use the same files on different systems. In the meantime, a few commonsense measures can reduce the risk of lock-in. Firms that use more than one cloud provider to host their data are less affected. So are those that keep their most important information in their own data centres. Consumers can take precautions, too. Some services are better than others at enabling users to move data between providers (Google does well on this score). Cloud computing promises its users many benefits, but don't mistake it for some sort of digital heaven.
Question: The author takes "the merger between Dell and EMC" for example to show _ .
Options: (A) the influence of cloud computing on computer and storage device makers (B) the miserable sufferings of old computer companies (C) the rapid development of new computer companies (D) the interaction between old companies and newcomers

Output: A

Input: Consider Input: Article: There are many traditions around the holidays. "Holiday traditions" are things that people do every year during a holiday such as Christmas or Thanksgiving. At Christmas, for example, many people put up a Christmas tree or Christmas lights. These are Christmas traditions that have been going on for many years. But there is a "new" Christmas tradition that has become very popular: _ , a TV channel that shows nothing but a large log fire, blazing in a fireplace. People put it on their TV and it makes them feel like they are watching and listening to a crackling fire. It makes them feel calm and comfortable. The origin dates back to 1986 in Canada. At that time, not very many people knew about it or watched the channel. Today, more than three million people watch the firelog channel during the winter holiday season. That year, the firelog channel was created to give the workers in the company that is now called Shaw Cable, a break at Christmas. By running the firelog during the holidays, everyone could go home for a few days and enjoy a bit of time off. At that time, it was only broadcast to people in Edmonton but today it reaches people across Canada and beyond. This year, the Shaw firelog was updated. It is pretty high tech. Although it's still really just a fire log that has been filmed, it has its own Twitter account (@ShawFireLog), its own Facebook page and it even has a computer App so you can see the burning log on a smartphone or a tablet. The Shaw firelog will burn until Jan. 5 on Shaw Cable, channel 222.
Question: What does this passage mainly talk about?
Options: (A) The origin and popularity of the TV firelog. (B) Famous holiday traditions. (C) What makes the TV firelog so popular. (D) The TV firelog today.

Output: A

Input: Consider Input: Article: After successfully serving their term for 4 years, military service men and women are given the choice to stay in the military of return to civilian life. For some, having to readjust to civilian life is one of the mist challenging assignments our returning soldiers and marines will ever to undertake. While people may think readjusting should be simple, they must take into consideration of all physical and mental stress our servicemen went through. Post-traumatic Stress Disorder ,or PTSD, is a mental disorder that can occur following the experience or witnessing of life-threatening events such as military combat . Most survivors of trauma return to normal given a little time. In the military, the marines are given a two-week course on how to return to civilian life. Unfortunately, some will have stress reactions that do not go away on their own, or may even get worse over time. These individual may develop PTSD. People who suffer from PTSD have difficulty sleeping because they are often reliving the experience through nightmares and flashbacks, and feel deserted or often stand off, and these symptoms can be severe enough an dlast long enough to significantly damage the person's daily life. Fullerton College, like most colleges, has its own Veteran's Office. Ray Bustos has been running the office for 3 years. Bustos acts as a liaison for the school and the veteran students. He makes sure the veterans returning to school get the right benefits. There are various types of financial aid for soldiers and marines. He strongly encourages the use of the Veteran Affairs website. The website is very informative and extremely helpful for veterans as well as for friends and s of veterans who want to learn more.
Question: One purpose of the writer in writing the passage is _ .
Options: (A) to introduce some methods to cure PTSD (B) to instruct PTSD patients to return to civilian life (C) to recommend a website to veterans and people concerned (D) to give military service men and women advice on civilian life
Output: C