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: Why do our eyes open wide when we feel fear? And why do our eyes become narrow when we express disgust ? According to a new research, it has something to do with survival. In a recently published paper, researchers concluded that expressions of fear and disgust changed the way human eyes gather and focus light. They argued that these changes were the result of evolutionary development and were intended to help humans survive, or at least discover, very different dangers. In order to test their hypothesis ,researchers examined two dozen volunteer college students with standard eye-exam equipment, and asked them to show expressions of fear and dislike. It was found that when the students widened their eyes, more light was admitted and their field of vision was expanded. When they wrinkled their noses in disgust, their eyes narrowed. This had the effect of blocking out more light but focusing on a specific point. Although some scientists have admitted that emotional expressions are intended primarily to communicate information, expressions of fear and disgust seem to perform different visual functions. "Eye widening may help to find a potential danger that requires much attention. And this would agree with the hypothesized function of fear," said researchers. "On the other hand, eye narrowing may help to distinguish and avoid different kinds of dangers, such as disease carriers and dirty foods. And this would agree with the hypothesized function of disgust." These findings supported naturalist Charles Darwin's view that expressions are not necessarily for communication and are not arbitrary ."If our expressions were arbitrary, they would show little cross-cultural relationship." researchers said. "But actually, our expressions probably have some universal functional principles."
Question: What is the hypothesis of the research in this text?
Options: (A) Changes of human eyes lead to different emotional expressions. (B) Evolutionary development helps humans survive different dangers. (C) Emotional expressions affect how human eyes collect or focus light. (D) Evolutionary development causes people to express different feelings.

Ex Output:
C

Ex Input:
Article: Ann was on her first package trip in Rosas, Spain. At the hotel, she checked in, and then went to her room to change before dinner. She was just ready to go downstairs when she found that her Spanish money wasn't in her handbag. She carefully looked in all her luggage, but she couldn't find it. All she had was a small purse with ten English pound notes in it! Ann found a place to change her English money. She had very few pesetas , and she would be here for two weeks. On her way back to the hotel, Ann bought some cheese, some bread and some oranges. When she got back, she told the manager that her doctor had told her not to eat Spanish food; she'd just have breakfast each day. That was all right, as she knew the price of hotels included breakfast. For the rest of her holiday, Ann swam in the hotel swimming pool, or lay on the beach and got a sunbath. When the other tourists went to interesting places, she always said she wasn't well. In fact, her holiday wasn't bad, except that she was always hungry. After all, a piece of fruit for lunch, and bread and cheese for supper isn't very much. Late in the afternoon of their last day, a girl, Jane, asked her why she never ate with them in the hotel restaurant. Ann told her about her money problems. Jane looked at her for a minute, and then said, "But didn't you know? The price of this holiday includes everything!"
Question: "A package trip" probably means _ .
Options: (A) a free trip (B) a pleasant trip (C) a trip that includes the cost of all the tickets and services (D) a long journey

Ex Output:
C