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: 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
A

Article: I believe children have a very pure sense of humor. Well, I would like to share my experiences with you. The other day when I was out with a friend and her daughter Jane at a restaurant, Jane ordered an apple dessert, which was the most attractive dish in that restaurant. However, when she had a bite of the pie, she shouted loudly, "Mom, why does it look good but tastes like rubber?" My friend was uneasy. Then the waiter gave us another dish. A child can say funny things. I was at a friend's home for tea and her son, Mark, wanted her to get up. His mom replied, "I can't, because my foot has fallen asleep now." Little Mark then sang a song and asked, "Mom, will it wake up now?" We laughed together. The other day we were having an interesting conversation over lunch and my friend, an animal activist , was arguing with another group member. Her son Tommy suddenly stood up, "Mom, people should never be allowed to shoot extinct animals!" That was funny and the child did manage to turn the argument into a pleasant conversation. Well, children sometimes really surprise us. I think we can have a lot to learn from them. They can help us understand the simple world through their eyes.
Question: Why did Jane shout loudly in the restaurant?
Options: (A) She wanted to make us laugh. (B) She thought her dish was attractive. (C) She wanted another piece of dessert. (D) She didn't like the flavor of her food.
D

Article: Immigration is the act of coming to a foreign country to live. The act of leaving one's country to settle in another is called emigration. Immigrants who flee their country because of persecution, war, or such disasters as famines or epidemics are known as refugees or displaced persons. Most people find it very hard to pull up roots in their native land and move to a strange country. But throughout history, countless millions of people have done so. The heaviest immigration worldwide took place from the early 1800's to the Great Depression, the economic hard times of the 1930's. In that period, about 60 million people moved to a new land. Most came from Europe. More than half immigrated to the United States. Other destinations included Canada, Argentina, Brazil, Australia, New Zealand, and South Africa. Today, the availability of fast, safe, and cheap transportation helps make migration easier. Asia is replacing Europe as the major immigrant-sending area. The United States remains the chief receiving nation. People abandon their homeland and move to another country for various reasons. The main reason for immigration has long been economic opportunity----the desire for better land or a better job. During the 1800's, for example, the rich prairie land of the United States attracted many European farmers. Today, professional people commonly emigrate because of better opportunities elsewhere. Such emigration has sometimes been called brain drain. Many doctors and nurses and numerous engineers and scientists have moved to the United States. Religious persecution has led many people to move to a new land for the freedom to practice their faith. Such immigrants include Jews expelled from England in the 1200's. Wars, revolutions, and political unrest have driven innumerable people to find new homes. In the 1990's alone, millions of refugees fled from warfare in Afghanistan, Iraq, Liberia, Iran, Uganda, Southeastern Asia, and Central America. Some immigrants were brought to a new land against their will. From the 1500's to the 1800's Europeans shipped black Africans to the Western Hemisphere as slaves. The United Kingdom transported prisoners to Australia from the late 1700s to the 1860s to relieve over crowding in British jails. Before that time, the United Kingdom sent prisoners to the American colonies. Immigrants have made enormous contributions to the culture and economy of such nations as Australia, Canada, New Zealand the United States. But their accomplishments have been made with great difficulty. At times, the United States, like many receiving countries, has restricted immigration to maintain a more homogeneous society in which all the people share the same ethnic, geographic, and cultural background. Although some immigration laws have been relaxed, many new comers of different backgrounds still face challenges in gaining acceptance.
Question: Most Immigrants to the United States in the nineteenth century came from _ .
Options: (A) Europe (B) Asia (C) Australia (D) South Africa
A