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.

Example Input: Article: We have only one earth.In a world with limited land, water and other natural resources, the harm from the traditional business model is on the rise.Actually, the past decades has seen more and more forests disappearing and globe becoming increasingly warm.People now realize that this unhealthy situation must be changed, and that we must be able to develop in sustainable ways.That means growth with low carbon or development of sustainable products.In other words, we should keep the earth healthy while using its supply of natural resources. Today, sustainable development is a proper trend in many countries.According to a recent study, the global market for low-carbon energy will become three times bigger over the next decades.China, for example, has set its mind on leading that market, hoping to seize chances in the new round of the global energy revolution.It is how trying hard to make full use of wind and solar energy, and is spending a huge amount of money making electric cars and high-speed trains.In addition, we are also seeing great growth in the global markets for sustainable products such as palm oil , which is produced without cutting down valuable rainforest.In recent years the markets for sustainable products have grown by more than 50%. Governments can fully develop the potential of these new markets.First, they can set high targets for reducing carbon emissions and targets for saving and reusing energy.Besides, stronger arrangement of public resources like forests can also help to speed up the development.Finally, governments can avoid the huge expenses that are taking us in the wrong direction, and redirecting some of those expenses can accelerate the change from traditional model to a sustainable one. The major challenge of this century is to find ways to meet the needs of growing population within the limits of this single planet.That is no small task, but it offers new chances for sustainable product industries.
Question: The traditional business model is harmful because of all the following EXCEPT that _ .
Options: (A) It makes the world warmer (B) it consumes natural resources (C) it brings severe damage to forests (D) it makes growth hard to continue
Example Output: B

Example Input: Article: During the 1800s, African Americans worked long days in the fields of the American South.To ease their labor, they sang "field hollers" that they had brought from Africa.One person sang a line.Then a group of workers repeated it.The songs' words told of the hardships that people suffered.African Americans sang "shout spirituals", or joyous religious songs.They clapped their hands and stomped their feet to the music. After the Civil War, the music changed dramatically.African American music, from ballads to church music, took new forms.It also adapted dance music, called "jump-ups".which had great rhythm. Banjos became popular.A blues singer usually played a call and response with the banjo.By the early 1900s, the guitar had replaced the banjo as the main blues instrument. Northern Mississippi - called the Delta - was the center of the blues tradition.By the 1920s, the Delta had many clubs, so-called juke joints.African Americans listened and danced to music in these clubs.Some of the greatest blues men and women performed there. Blues have a soulful sound that is easy to recognize.The musical notes are often "bent".That is, they are changed slightly to give a song more strength.Whatever their origin, these bent notes most often define the blues. Lyrics are the words of a song.Blues lyrics describe everyday life.The lyrics, often about relationships between men and women, are often very intense and personal.They tell about sorrow and overwork.They tell about finding or losing love, having money or being broke, being happy or sad and lonely.The lyrics may use humor to describe life's trials and joys.They almost always use the rhythms of everyday speech.A typical blues stanza, or group of lyrics, has three lines.The second line repeats the first line.The third line has different words. By the 1940s, large numbers of African Americans had left the Delta and moved north to work. Many settled in Chicago.There, a new kind of "electric", or "Chicago" blues began.Many of its themes were the same, but these blues had "wailing" electric guitars and harmonicas.The music had a steady, strong drumbeat.The loud, driving Chicago blues was excellent dance music.Chicago blues led to the birth of a new music style-rock and roll.
Question: The "field holler" is a kind of music that came from _ .
Options: (A) the American South. (B) Africa. (C) Chicago. (D) Asia.
Example Output: B

Example Input: Article: It's interesting to see how people make use of the time they spend on public transport in Indian cities like Delhi and Mumbai. In crowded buses and trains people manage to take a short nap and some even reach the snoring stage. Or they spread out a newspaper over multiple knees and arms to read about the latest sport results or political crisis. Then there are the experienced travellers who have been playing cards with the same group over the last decade or so. They even have their specific seats so well-worn that you can make out the shape of their backsides. There is no doubt about it. Travelling by public transport is being in the thick of the seasons of life -- a sweaty life in summer where people, blissfully unaware of the rivers of sweat running down their brows and inside their clothes. At the first smell of a perfumed man or woman boarding the stuffy bus or train, most people feel they are reborn. During the rains you can't avoid getting wet or muddied. The windows, almost always, are not a perfect fit and if you're not drenched by a sudden, heavy rain shower then you are bound to catch a jet spray of muddy water caused by a fellow motorist driving fast through a puddle. Rains are a perfect time for people to switch their old umbrellas for new ones. Since there are so many that look alike, it's impossible to tell whose is whose. Winter is the time when it feels good -- or at least warm -- to be part of a crowd. It is amazing how much the collective breaths of a 100 or so people can raise the freezing temperature inside. Looking at the masses dressed in their bright red pullovers or green coats, it's fun to imagine what faces lie beneath their dark woolen hats. The cold winter passes, making way for spring. It is impossible not to see every little flower by the wayside blooming proudly. And the warm sun manages to transmit some of their pleasantness to the inside of a bus or train. Now, wouldn't it be perfect if we had a public transport worth the name in all our cities?
Question: On Indian public transport, you can always expect to see people _ .
Options: (A) sleeping and reading newspapers (B) arguing and playing games (C) enjoying the view and playing cards (D) carrying umbrellas and whispering politely
Example Output:
A