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: Until I was twelve years old, I thought everyone in the world knew about the grinnies, if I thought about the term at all -- which is unlikely. After all, everyone in my family used the word quite naturally, and we understood each other. So far as I knew, it was a word like any other word -- like bath, orchocolate, orhomework. But it was my homework which led to my discovery thatgrinnieswas a word not known outside my family. My last report card had said that I was a "C" student in English, and my parents, both teachers, decided that no child of theirs would be just an average student of anything. So nightly I spelled words aloud and answered questions about the fine points of grammar. I wrote and rewrote and rewrote every composition until I convinced my mother that I could make no more improvements. And the hard work paid off. One day the teacher returned compositions, and there it was -- a big fat, bright red "A" on the top of my paper. Naturally, I was delighted, but I didn't know I was attracting attention until the teacher spoke sharply, "Helen, what are you doing?" Called suddenly out of my happy thoughts, I said "Oh, I've got the grinnies!" The teacher and my classmates burst into laughter, and then I understood that grinnies were used inside my family. Other people were not so lucky. And it is really lucky to have the grinnies, an uncontrollable, natural state of great pleasure. Grinnies are shown on the outside by sparkling eyes and a wide, wide smile -- not just any smile, but one that shows the teeth and stretches the mouth to its limits. A person experiencing the grinnies appears to be all mouth. On the inside grinnies are characterized by a feeling of joyful anxiety. Grinnies usually last just a few seconds, but they can come and go. Sometimes, when life seems just perfect, I have occasional attacks of the grinnies for a whole day. The term originated in my mother's family. Her younger sister, Rose, who had deep dimples , often expressed her pleasure with such a grin that the dimples appeared to become permanent. When Rose was about four, she started explaining her funny look by saying, "I have the grinnies". The term caught on, and it has been an important word in our family now for two generations. The occasion doesn't matter. Anything can bring on the grinnies -- just so long as one feels great delight. When my brother finally rode his bicycle -- without training wheels -- from our house to the corner and back, he came home with the grinnies. When I was little, my mother's announcement that we would have homemade ice cream for dessert always gave me the grinnies. My father had the grinnies when I was chosen to make a speech at the end-of-school-year ceremony. Grinnies can be brought on by a good meal, a sense of pride, a new friend, a telephone call from someone special, an achievement. Or sometimes one gets the grinnies for no reason at all: just a sudden sense of happiness can bring on a case. Whatever brings them on, an attack of the grinnies is among life's greatest pleasures. In fact, now that I look back on the experience, I feel sorry for my seventh-grade teacher. I think it's a pity that she didn't know the word grinnies. It's such a useful term for saying, "I'm really, really pleased!"
Question: After the writer was twelve years old, she _ .
Options: (A) thought everyone knew the meaning of "grinnies" (B) equaled "grinnies" to bath or chocolate in meaning (C) got to know "grinnies" was used only inside her family (D) discovered the word "grinnies" through her mother

Ex Output:
C

Ex Input:
Article: Duke Ellington is known as one of the most important composers of his time, and his work has been enjoyed for more than 80 years by music lovers all over the world. During his lifetime Ellington turned musical sounds into many compositions, mostly in the style known as jazz. The Early Years Edward Kennedy Ellington was born in 1899 in Washington, D. C. It wasn't until Ellington was a teenager that his interest in music grew. He taught himself to play the piano by listening to local piano players. Sometime around 1916 Ellington began playing the piano at high school parties. Ellington realized that he enjoyed entertaining people with his music. He soon became a very popular musician, playing at parties and other events in the Washington area. Young adults seemed especially delighted by the modern pieces he composed. Success in New York In 1923, when Ellington was almost 24 years old, he joined The Washingtonians, a five-piece group of musicians in Washington, and became the group's leader in early 1924. In 1927 Ellington and his orchestra won an engagement at Harlem's famous Cotton Club. For the next three years, his orchestra played at the Cotton Club nearly every night. The Influence of the Cotton Club Working at the Cotton Club encouraged Ellington's creativity. Since the shows changed every six months, he was challenged by the need to continually develop new material. He had to compose a wide variety of music to accompany the various acts in the Cotton Club shows and to adapt that music to the strengths and weaknesses of the players in his orchestra. By 1928 the popular nightspot began radio broadcasts. From the broadcasts Ellington and his orchestra gained a national reputation. On the Road As Ellington's popularity increased, he realized that his orchestra could do well on concert tours. They left the Cotton Club in 1931 and toured America and Europe almost continually for the next 43 years. In addition to touring, Ellington made recordings and continued to compose music. Duke Ellington played the piano, composed music, and led his famous orchestra for more than 50 years, until his death in 1974. Music lovers all over the world agree that the large quantity of music he created will be enjoyed for many years to come.
Question: Which of the following can show us Ellington's leadership ability?
Options: (A) Ellington was very popular at parties in the Washington area. (B) Ellington took the responsibility for a band for a long time. (C) Ellington did live radio broadcasts in New York City. (D) Ellington continually developed new material.

Ex Output:
B

Ex Input:
Article: What is a six-letter word that immediately comes to mind when you need some information on the Internet? You probably thought of Google. But Google wasn't always the name of the famous search engine. In fact, the original name was BackRub! BackRub was the name two graduate students gave to the new search engine they developed in 1996. They called it BackRub because the engine used backlinks to measure the popularity of Web sites. Later, they wanted a better name -- a name that suggests huge quantities of data. They thought of the word googol. (A googol is a number followed by 100 zeros.) When they checked the Internet registry of names to see if googol was already taken, one of the students misspelled the word by mistake, and that's how Google was born. Google is just one example of a name change in the business world. Many other companies have decided to change their names or the names of their products. Here are some more examples: Jerry Yang and David Filo, two young computer specialists, developed a guide to Internet content in 1994. They called it "Jerry and David's Guide to World Wide Web." But they soon realized that this wasn't a very catchy name, so they searched through a dictionary and found a better one: "Yahoo." Sometimes companies change their names because of the popularity of one of their products. In 1962, a young runner named Phil Knight started a company called Blue Ribbon Sports. In 1971, Knight decided to design and manufacture his own brand of shoes. He named the shoes after the Greek goddess of victory -- Nike. Nike shoes became so well known that Knight changed the name of the whole company to Nike.
Question: According to the text, Google _ .
Options: (A) has been famous since 1996 (B) is a result of a spelling mistake (C) means a number followed by 100 zeros (D) is the original name of the search engine

Ex Output:
B