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.

Ex Input:
Article: Do you start your work by making a list of all you have to complete, from walking the dog and washing the clothes, to phoning a or checking your emails? Do you always take a list with you to the supermarket? Do you write down all the steps you need to see a big project through? If you're a natural list maker you can consider this habit as a good thing to do. Here are some reasons: Gives your memory a kick: Even if you pride yourself on remembering all you need to complete, it's only human to forget every once in a while. A to-do list is a handy reminder. Helps you stay in the moment: It sounds surprising, but true. Trying to mentally keep track of the things weighing on your mind can make it tougher to concentrate on the activity at hand. _ : Instead of carrying around a nagging nervousness that you've forgotten to take care of a chore, keeping an up-to-date list can help relieve that kind of stress. Helps planning: Most of us are likely to put off until tomorrow what we can do today, but keeping a list helps to keep this natural impulse at bay. Thinking about what has to be done in advance is a good way to prevent us from falling behind schedule. Prioritizes : Seeing everything we want to take care of allows us to prioritize and give the most time to the more important tasks. On the other hand, not having a to-do list makes it possible for us to spend too much time on unimportant items. Boosts happiness: You will feel very happy each time you check off a task you have completed on your list. Studies show that reaching your goal actually releases feel-good chemical in your brain that boosts happiness.
Question: The author introduces the topic to be discussed by _ .
Options: (A) asking a series of questions (B) presenting some simple facts (C) stating his own point of view (D) listing the benefits of a to-do list

Ex Output:
A

Ex Input:
Article: With only two weeks to go before Christmas, buying presents is a lug priority for a lot of people. However, this year not so many people are leaving their homes to browse around the shops. These days lots of people do their shopping in the comfort of their own home with the help of the Internet. Online shopping is becoming more and more popular for a number of reasons: prices are often lower online, you don't have to queue up in busy shops and you can buy almost any product imagin- able with just a few clicks of your mouse. Computer trends are often man-dominated but this year women are expected to do more shop-ping on the Internet than men. It seems .that women are now more attracted to the convenience of on-line shopping than they used to be. Average spending online this Christmas by women will rise to $240 compared to the slightly lower average $233 for men, while the average spending per person on the high street is only $197. 70% of lnternet users, male and female, are now buying their Christmas gifts online. In the past a lot of people were unwilling to shop online. Many were worried about the security of entering their card details on the Intemet and the reliability of the Internet but as shopping; online has become more widespread, these worries have begun to disappear. 45% of Internet users still do have security worries but it hasn't slowed the ever-increasing numbers of online shoppers. One victim of the online shopping boom is the UK high street. Christmas trading can represent up to 60% of turnover for some stores. Many companies are concerned that not enough shoppers are coming through their doors in the run-up to Christmas. As a result there are lots of special offers in the shops. Most shops traditionally have sales after Christmas but this year the bargains have come early.
Question: Why don't people browse around the shops to buy Christmas presents thus year?
Options: (A) Because they don't have enough time. (B) Because Christmas is two weeks away. (C) Because they go shopping on the lnternet. (D) Because it isn't convenient for them to leave their houses.

Ex Output:
C

Ex Input:
Article: Thousands of taxi drivers in Shenyang, Liaoning province, reportedly blocked streets with their vehicles on Sunday in protest against unlicensed vehicles using taxi-hiring apps and apps-based car rental companies providing passenger services, including high-end cars. Although the drivers also complained about the withdrawal of the fuel subsidy by the government, their main complaint was the loss of business because of the rising number of Internet-based car services companies. On Wednesday, news reports came that Beijing transport authorities will take measures to stop the illegal "taxi business" of private cars through the newly rising Internet apps, following the footsteps of Shenyang and Nanjing.[:Z#xx#k.Com] It is not yet clear how the Shenyang city government will handle the issue and whether it will declare the services offered by market leaders such as Didi Dache, a taxi-hiring app provider backed by Tencent Holdings, and Kuaidi Dache illegal. But Shanghai transport regulators have set a rule, by banning Didi Zhuanche, or car services offered by Didi Dache in December. Such regulations will cause a setback to the car-hiring companies and investors that are waiting to cash in on the potentially booming business. Just last month, Didi Dache got $700 million in funding from global investors, including Singapore state investment company Temasek Holdings, Russian investment company DST Global and Tencent. Besides, the market is uncertain that Kuaidi Dache is about to finalize its latest round of funding after getting $800 million from global investors. Regulatory uncertainties, however, could cast a shadow on the future of the Internet-based car-hiring services, which have become popular in most of China's big cities. To be fair, these companies' business model is anything but bad. For example, Didi Zhuanche works side by side with established car rental companies to provide high-end car service mainly for businesspeople through the Internet and mobile phone apps. Every link in this business model chain has legal companies and services. Hence, it is hard to define it as illegal and ban it.
Question: Why did taxi drivers in Shenyang block the streets with their vehicles?
Options: (A) Because they wanted the government to increase their driving allowances. (B) Because they wanted to be educated how to use the taxi-hiring apps. (C) Because they wanted to make their main complaints known to the government. (D) Because they wanted to call on passengers not to hire the private cars.

Ex Output:
C