In this task, you're given an article, a question which often contains a blank, four options (associated with "A", "B", "C", "D") and the answer to that question. Your task is to classify whether the given answer is correct or not by providing "Yes" or "No", based on the article.

Article: DIY sailor Owen Warboys has finally launched his homemade boat -- after spending nearly 30 years building it in his mum's garden. Owen, 66, a retired engineer from Hordle, New Milton, Hants, first started work on the 40ft--long boat in 1982 because he could not afford to buy his own. He told mum Edith that it would only take five years but after suffering "a few problems" it lasted nearly three decades. When he finally finished, he was left with the head-scratching task of getting the 18-tonne boat out of the back garden. After some time he found a way. A huge crane was brought in to carefully raise it 40ft in the air over his mother's house and onto a lorry. It was then driven to the seaside and, to Owen's delight, it floated and showed no signs of leaking when lowered into the water. Now, 28 years after he first started, Owen is at last preparing to set sail in his beloved boat, Wight Dolphin, with his long-suffering wife Anne. Owen said, "I am so relieved that it's finished. There were times when I thought it would never end but I'm the sort of person who likes to finish something once I've started." At first he persuaded his mum to let him do it in her garden and started taking in sheets of steel and pieces of wood. "My mother was happy for me to build it at her house but only bacause I told her it would only take five years."
Question: Why did Owen decide to make his own boat by himself?
Options: (A) He wanted to kill time after his retirement (B) He wished to set a new world record (C) He didn't have enough money to buy a boat (D) He had a hobby of making things by hand
Asnwer: C
Yes

Article: YOU probably think you know about London's problems. The people are unfriendly, it's way too expensive, and the food is terrible - so why do so many tourists flock there? London was named the world's most popular city between July and September 2013. It _ other world-famous cities such as New York and Paris, welcoming 4.9 million visitors, according to the UK Office for National Statistics. Amazingly, this was an increase of almost 19.5 percent on 2012 - the year when the Olympics happened in summer. So can London's success be explained? Well, maybe. As the English writer Samuel Johnson once said, "when a man is tired of London, he is tired of life". London life is often crazy and expensive, but if you can think of something, you can probably do it there. Anywhere in the city, you can often look around a great museum such as the British Museum, watch a concert at a historic venue like the Royal Albert Hall, or dance the night away in a cool nightclub such as Fabric. And it's not just about culture - there are also world-famous sporting venues around the city. Many tourists like to watch soccer matches at stadiums such as Chelsea's Stamford Bridge, Arsenal's Emirates Stadium, or Tottenham's White Hart Lane. Tourists even came to watch British tennis player Andy Murray's famous victory at the Wimbledon tennis tournament in 2013. Yes, but what about the food? Well, even if you don't like British food - and if you've never had real fish and chips, or a summer pudding, then perhaps you should wait until you've tried them - there is plenty of great food from all over the world available in London's many restaurants. London, like many of its buildings, has a long history, but also never lacks a vibrant pulse . All over the city, history and modernity come together to make it an essential place for tourists to discover.
Question: What is the author's main purpose in writing the article?
Options: (A) To show the effects of the 2012 London Olympics. (B) To analyze why London appeals to tourists. (C) To compare London with other world-famous cities. (D) To talk about common problems in London.
Asnwer: B
Yes

Article: JINTAN, JIANGSU: The 20 students -- 18 boys and 2 girls --had a thousand reasons to be proud of themselves. They had just climbed their way to the top rung out of 4 million students taking part in the Fifth National Hua Luogeng Gold Cup Mathematics Contest on Tuesday evening. The 20 gold medal winners are all primary and middle school students under the age of 14. 'Many of the problems are of college level and these pupils can _ them _ . It is just unbelievable!'said a teacher from Guangdong province. Named after China's most famous mathematician, Hua Luogeng, the contest started in 1986,one year after his death. In less than 10 years, it has been recognized by the State Education Commission as the country's biggest and best contest of its kind.
Question: This news story is mainly about _ .
Options: (A) when the contest started (B) how the contest got its name (C) the 20 pupils who have won gold medals in the contest (D) the 5th National Hua Luogeng Gold Cup Mathematics Contest
Asnwer: D
Yes