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: Shopping in the United States changes a lot.About ninety years ago most people shopped in small stores that were owned by one person or a family.Women went from the bakery to the butcher's to the grocer and on to the fruit and vegetable seller in order to get their food for the week. Then about sixty years ago, supermarkets were born.In a supermarket, people could get all the different kinds of food they needed without going to different stores. The next big change in shopping in the United States was the shopping mall.A shopping mall is a group of stores under one roof.Because malls allowed people to shop without worrying about the weather, they soon became very popular.The mall became a place for people to socialize in addition to shopping.If you walk through a mall, you will see older people sitting, chatting and drinking coffee.Malls are places for teenagers to hang out.Many teens will often just "go to the mall" and spend time with their friends. The recent change in American shopping was the superstore.Large chain stores such as Wal-Mart, Office Depot and Toys "R" Us have been built all across the United States.Because they are so large, they can buy goods at a great discount and sell them much cheaper than smaller stores. Sometimes, when they are built near small towns, many of the small town stores have to close.They just cannot compete with their giant neighbors. And now, online shopping is becoming more and more popular all over the States.People are too busy to go to the physical stores, so they go shopping over the Internet.Online shopping has lots of advantages.For instance, online stores are usually available 24 hours a day.Searching or browsing online shops can be faster than browsing the physical stores.While, online shopping also has its disadvantages.People are at higher risk of being cheated on the part of the merchant than in a physical store.And privacy of personal information may be let out.
Question: Which is the place for people to spend time with others according to the passage?
Options: (A) Shopping malls (B) Small stores (C) Supermarkets (D) Superstores
A

Article: Treasure hunts have excited people's imagination for hundreds of years both in real life and in books such as Robert Louis Stevenson's Treasure Island. Kit Williams, a modern writer, had the idea of combining the real excitement of a treasure hunt with clues found in a book when he wrote a children's story, Masquerade, in 1979. The book was about a hare, and a month before it came out, Williams buried a gold hare in a park in Bedfordshire. The book contained a large number of clues to help readers find the hare, but Williams put in a lot of "red herrings", or false clues, to mislead _ . Ken Roberts, the man who found the hare, had been looking for it for nearly two years. Although he had been searching in the wrong area most of the time, he found it by logic, not by luck. His success came from the fact that he had gained an important clue at the start. He had realized that the words: "One of Six to Eight" under the first picture in the book connected the hare in some way to Katherine of Aragon, the first of Henry VIII's six wives. Even here, however, Williams had succeeded in misleading him. Ken knew that Katherine of Aragon had died at Kimbolton in Cambridgeshire in 1536 and thought that Williams had buried the hare there. He had been digging there for over a year before a new idea occurred to him. He found out that Kit Williams had spent his childhood near Ampthill, in Bedfordshire, and thought that he must have buried the hare in a place he knew well, but he still could not see the connection with Katherine of Aragon, until one day he came across two stone crosses in Ampthill Park and learnt that they had been built in her honor in 1773. Even then his search had not come to an end. It was only after he had spent several nights digging around the cross that he decided to write to Kit Williams to find out if he was wasting his time there. Williams encouraged him to continue, and on February 24th 1982, he found the treasure. It was worth L3000 in the beginning, but the excitement it had caused since its burial made it much more valuable.
Question: What is the subject discussed in the text?
Options: (A) An exciting historical event. (B) The importance of logical thinking. (C) The attraction of Masquerade. (D) A modern treasure hunt.
D

Article: Just getting accepted to an American college or university does not guarantee that you will get a visa. And getting a visa just lets you arrive in the United States. It does not guarantee that an immigration officer will permit you to enter the country. If you are requesting a visa for the first time, you will probably have to go to an American embassy or consulate . You will need to bring a government form sent to you by your American school that shows you have been accepted. You will also need banking and tax records that show you have enough money to pay for your education. And be prepared to provide evidence that you will return to your home country after your studies end. All of this is important in satisfying the requirements to get a visa. A consular official will also take your picture and your fingerprints. Foreign students must contact their local embassy or consulate to request an interview and to get other information. This includes directions about how and where to pay the visa application charge. The cost is two hundred dollars. You should apply for the visa as soon as you have been accepted to a school in the United States. The government needs time to perform a background investigation. You cannot receive a visa more than one hundred twenty days before the start of your program. And if you are coming as a student for the first time, you cannot enter the country more than thirty days before classes begin. Once you come to the United States, you can stay for the length of your period of study. Your school is required to provide the Department of Homeland Security with reports on your status as a student.
Question: When should you apply for a visa?
Options: (A) The moment you have been accepted to a school in the US. (B) One hundred twenty days before you go to the US. (C) Thirty days before classes begin. (D) After the immigration officer permit you to enter the US.
A