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: 1826, a Frenchman named Niepce needed pictures for his business .But he was not a good artist.So he invented a very simple camera .He put it in a window of his house and took a picture of his garden .That was the first photo. The next important date in the history of photography was 1837. That year, Daguerre, another Frenchman, took a picture of his studio. He used a new kind of camera and a different processs. In his pictures, you could see everything very clearly, even the smallest details. This kind of photograph was called a daguerreotype. Soon, other people began to use Daguerre's process. Travellers brought back daguerreotypes from all around the world. People photographed famous buildings, cities and mountains. In about 1840, the process was improved. Now photographers could take pictures of people and moving things. The process was not simple. The photographers had to carry lots of film and processing equipment. But this did not stop the photographers, especially in the United States, where from the 1840s daguerreotype artists were popular in most cities. Mathew Brady was a well-known American photographer. He took many pictures of famous people. The pictures were unusual because they were very life-like and full of personality. Brady was also the first person to take pictures of war. His 1862 Civil War pictures showed dead soldiers and ruined cities. They made the war seem more real and more terrible In the 1880s, new inventions began to change photography. Photographers could buy film readymade in rolls. So they did not have to make the film immediately. They could bring it back to their studios and develop it later, meaning that they did not have to carry lots of equipment. And finally, the invention of the small handheld camera made photography less expensive. With the small camera, anyone could be a photographer. People began to use cameras just for fun. They took pictures of their families, friends and favourite places. They called these pictures "snapshots". Photographs became very popular in newspapers in the 1890s. Soon magazines and books also used documentary photographs. These pictures showed true events and people. They were much more real than drawings. Photography had turned into a form of art by the beginning of the 20th century. Some photographs were not just copies of the real world. They showed ideas and feelings, like other art forms.
Question: The passage is mainly about _ .
Options: (A) the invention of cameras (B) a kind of new art -- photography (C) the development of photography (D) the different uses of cameras in history
Example Output: C

Example Input: Article: Today's career assumption is that you can get a lot of development, challenge and job satisfaction and not necessarily be in a management role. Managing others is always a tough task, but in the past that stress was balanced by hopes for career mobility and financial rewards. Along with a sizable pay raise, people chosen as managers would begin a nearly automatic climb up the career ladder to successful executive private benefits: company cars, club memberships, plus the key to the executive washroom. But in today's global and more competitive showground, a manager sits in an insecure chair. More companies has begun to take less management as they come to view their organizations as collections of talents rather than hierarchies . There are far fewer steps for managers to climb. Also, managerial jobs demand more hours and headaches than ever before but offer slim, if any financial paybacks and perks. Now managers must manage many people who are spread over different locations, even over different continents. They must manage across functions with, say, design, finance and marketing. In many companies, when the most praised people in business are those launching something new, management seems like an invisible, thankless role. Employers are looking for people who can do things, not for people who make other people do things. Moreover it may not pay to be a manager, at least not the way it once did. Ms. Chmielewski says, "The emotional rewards can be great, and there were times when I enjoyed management. But a 10-to-11-hour day and one weekend day a month is the norm ". With more people cautious of joining management, are companies being hurt or worrying about developing future leaders? Not many are. While employers have fired a lot of managers, they believe many more candidates linger on at many companies. "Another reason why companies aren't short of managers," argues Robert Kelley, a business professor, "is that so many workers today are self-managed, either individually or via teams, they don't need a manager."
Question: By writing the passage, the writer seems to _ .
Options: (A) explain reasons for firing managers (B) advise people not to become managers (C) express dissatisfaction of some managers (D) encourage managers to be more competitive
Example Output: B

Example Input: Article: Tiny monitoring devices have become an increasingly common way for scientists to study elusive animals that are difficult to track on a day-to-day basis. However, now it seems that smart. seals have caught on to the trick and are using it to their advantage to catch fish! To find out if that is true, a team of researchers from the University of St. Andrews in Scotland selected a group often young grey seals that had neither encountered the ocean nor been exposed to any kind of acoustic tags. The researchers then placed the seals one at a time, inside a pool that contained 20 foraging boxes, only two of which housed fish -- one with tags and the other without. Each seal was allowed to explore the boxes twenty separate times. In order to ensure that mammal was not depending on its memory, the fish were moved to different boxes each time. At first, there was no difference in the amount of time it took the seals to discover the tagged and untagged fish. However, after they had been in the pool a few times, they started locating the tagged fish much faster. To confirm that this indeed was the case, there searchers conducted a second experiment using two boxes -- one with pieces of fish and the other with just acoustic tags. Sure enough, the seals were all attracted to the one that was sending out signals. While this experiment involved only seals, the researchers believe that other marine mammals may also be using the information to catch prey. Sadly, predators like sharks that have been tagged by scientists may be negatively affected, as pings they emit could warn their prey of their presence. Besides potentially messing up nature's food chain, the "dinner bell" effect of the acoustic tags could also mean that the conclusions reached by previous fish studies may not be correct. Now that the secret is out, scientists will have to come up with another way to conduct their studies -- one that is not detectable by the crafty marine animals.
Question: What is implied about the ten young grey seals?
Options: (A) They have acoustic tags attached to them. (B) They have better hearing than normal seals. (C) They have been trained to recognize acoustic tags. (D) They were not born in the ocean.
Example Output:
D