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: Printing images is easy. Just select an image of a purple robot on your PC, for example, and press print. Your home printer exactly shoots drops of ink onto a flat piece of paper, creating the robot's 2-D image. "Printing" 3-D objects is different. Take the purple robot. First select a file of the 3-D printer. Immediately, the printer begins making noise, and a nozzle releases plastic material in thin layers. In two or three hours, a 3-D purple robot is standing before you. 3-D printing has developed to the point where printers can now create high-quality objects using a variety of materials, including metals. That means 3-D printers can now make final products that meet high industrial standards. 3-D printers are already being used to make parts for racecars and jets as well as man-made limbs and hearing aids. So far, few homes have 3-D printers. That's because 3-D printing is not only new to most people but also quite expensive. To bring 3-D printing to the masses, some retail stores plan to offer the service. For example, the Staples chain of office supply stores has announced that it will offer 3-D printing in Europe beginning in 2013. Customers will be able to submit their own 3-D designs to Staples website for printing. After the job is done, they'll pick up their item at a nearby Staples store or have it mailed to their homes. This service is sure to encourage many more people to try out 3-D printing.
Question: According to this article, who are 3-D printed parts already helping?
Options: (A) People with physical disabilities. (B) People in the solar energy field (C) People who lack suitable housing (D) People in need of computer skills
Example Output: A

Example Input: Article: There are many types of reports.A report is simply an account of something that has happened.The commonest are news reports.We get them in newspapers,over radio and on television.Sometimes cinemas also show us newsreels. The main purpose of a newspaper is to provide news.If you examine a newspaper closely,you will find that there are all types of news:accidents,floods,fires,wars,fashions ,sports,books,etc.The news covers everything that happens to people and their surroundings.Sometimes there are news items which are very amusing. A news report is usually very short,except when it is about something very important,but it contains a lot of information.It is also written in short paragraphs.The first paragraph is in fact a summary of the news item.It gives all the necessary information,what,when,where,how and why.The other paragraphs give full details of the subject.There may also be interviews with people.The words actually spoken by them are within inverted commas . Often there are photographs to go with the news to make it more interesting.
Question: The easiest way to get today's news is _ .
Options: (A) to go to the cinema (B) to watch a color TV (C) to read today's newspapers (D) to listen to the music over radio
Example Output: C

Example Input: Article: A gentleman put an advertisement in a newspaper for a boy to work in his office. Out of the nearly fifty men who come to apply, the man selected one and dismissed the others. "I should like to know," said a friend, "the reason you preferred that boy, who brought not a single letter--not a recommendation ," "You are wrong" said the gentleman. He had a great man. He wiped his feet at the door and closed the door after him, indicating that he was careful. He gave his seat immediately to that old man, showing that he was kind and thoughtful. He took off his cap when he came in and answered my questions, showing that he was polite and gentlemanly. " All the rest stepped over the book which I had purposely put on the floor." He picked it up and placed it on the table; and he waited quietly for his turn instead of pushing and crowding. When I asked to him, I noticed his tidy clothing, his neatly brushed hair, and his clean fingernails. " Can't you see that these things are excellent recommendations? I consider them more significant than letters."
Question: A gentleman put an advertisement in a newspaper _
Options: (A) in order to hire an office boy (B) so as to dismiss the others (C) in order to select one among the fifty applicants (D) so as to select one and dismiss the others
Example Output:
A