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: VOIP stands for Voice Over Internet Protocol. It is also referred to as IP Telephony. It is another way of making phone calls, though the 'phone' part is not always present any more, as you can communicate without a telephone set. VOIP is especially popular with long distance calls. The main reason for which people are so massively turning to VOIP technology is the cost. VOIP is said to be cheap, but most people use it for free. Yes, if you have a computer with a microphone and speakers, and a good Internet connection, you can communicate using VOIP for free. There are basically three ways of using VOIP. One is to have a PC on both communicating sides; another is to have a phone on one side and a PC on the other and the third is to have two phones. VOIP is a ly new technology and it has already achieved wide acceptance and use. There is still a lot to improve and it is expected to have major technological advances in VOIP in the future. It has so far proved to be a good candidate for replacing the POTS (Plain Old Telephone System). It, of course, has drawbacks along with the numerous advantages it brings; and its increasing use worldwide is creating new considerations surrounding its regulations and security. The growth of VOIP today can be compared to that of the Internet in the early 90's. The public is getting more and more conscious of the advantages they can get from VOIP at home or in their businesses. Advertising campaigns, which are present everywhere on the net, are contributing a lot towards the popularization of VOIP which not only gives facilities and allows people to save, but also producing huge income for those who dived early into the new phenomenon.
Question: The author writes the passage mainly to _ .
Options: (A) ask readers to buy the new type of production. (B) tell us how fast the modern technology is developing. (C) introduce a new type of IP technology---VOIP. (D) teach the readers how to use VOIP.

Ex Output:
C

Ex Input:
Article: New research at Washington University School of Medicine in St. Louis shows that people who struggle with mood problems or addiction can safely quit smoking and that kicking the habit is associated with improved mental health. Cavazos-Rehg, an assistant professor of psychiatry, found that quitting or significantly cutting back on cigarette smoking was linked to improved mental health outcomes. Quitting altogether or reducing by half the number of cigarettes smoked daily was associated with lower risk for mood disorders like depression, as well as a lower likelihood of alcohol and drug problems. "We don't know if their mental health improves first and then they are more motivated to quit smoking or if quitting smoking leads to an improvement in mental health," Cavazos-Rehg said. "But either way, our findings show a strong link between quitting and a better psychiatric outlook." In addition, she believes the serious health risks associated with smoking make it important for doctors to work with their patients to quit, regardless of other psychiatric problems. "About half of all smokers die from related to smoking, so we need to remember that as complicated as it can be to treat mental health issues, smoking cigarettes also causes very serious illnesses that can lead to death," she explained. Cavazos-Rehg and her team analyzed questionnaires gathered as part of the National Epidemiologic Study on Alcohol and Related Conditions. In the early 2000s, just under 35,000 people were surveyed. As part of the study, they answered questions about drinking, smoking and mental health in two interviews conducted three years apart. The researchers focused on data from 4,800 daily smokers. Those who had addiction or other psychiatric problems at the time of the first survey were less likely to have those same problems three years later if they had quit smoking. And those who hadn't had psychiatric problems at the initial survey were less likely to develop those problems later if they already had quit. "We really need to spread the word and encourage doctors and patients to tackle these problems," Cavazos-Rehg said. "When a patient is ready to focus on other mental health issues, it may be an ideal time to address smoking cessation, too."
Question: What is the main idea of the passage?
Options: (A) Smoking was associated with alcohol and drug problems. (B) Quitting smoking may help to improve mental health. (C) Smoking can lead to cancer or other deadly problems. (D) Those who had mental problem are more motivated to quit smoking.

Ex Output:
B

Ex Input:
Article: Just 50 years ago Manx seemed to be on the point of disappearing. "If you spoke Manx in a pub on the island in the 1960s, it was considered provocative and you were likely to find yourself in a fight," recalls Brian Stowell, a 76-year-old islander who has written a Manx-language novel,The Vampire Murders, and presents a radio show on Manx Radio spreading the language every Sunday. The language itself is similar to the Gaelic tongues spoken in the island's neighbours, Ireland and Scotland. A century ago, "Moghrey mie" would have been commonly heard instead of good morning on the island. "In the 1860s there were thousands of Manx people who couldn't speak English," says Stowell. "But only a century later it was considered to be so backwards to speak the language that there were stories of Manx speakers getting stones thrown at them in the towns. "I learnt it myself from one of the last surviving native speakers back in the 1950s." Recession( ) in the mid 19th Century forced many Manx residents to leave the island to seek work in England. And parents were not willing to pass the language down through the generations, with many believing that to have Manx as a first language would affect job opportunities overseas. There was a fall in the language. By the early 1960s there were perhaps as few as 200 who spoke the tongue. The last native speaker, Ned Maddrell, died in 1974. Unesco pronounced the language died out in the 1990s. Now there is even a Manx language primary school in which all subjects are taught in the language, with more than 60 pupils attending. Manx is also taught in other schools across the island.
Question: What does "Moghrey mie" mean according to the passage?
Options: (A) All the best. (B) Congratulations. (C) Never mind. (D) Good morning.

Ex Output:
D