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.

[EX Q]: Article: While many other teen stars built up their celebrity status by working hard on popular TV shows, Justin shot straight to the top by using social media. A few years ago, Justin uploaded videos of himself on YouTube, showing _ of his favorite songs at home. He just saw it as a bit of fun for friends and family, but when music manager Scooter Braun saw one of the videos, he flew to Justin's hometown of Ontario, Canada to sign him up. Justin was just 13. Shortly after, Justin was flown to the US. He eventually started working with R&B superstar Usher. Justin's first album My world was released in 2009. But all the time, Justin continued to build his fan base on his YouTube account, where some of his original home videos can still be found, and where he continues to post music. "I wasn't sending mixtapes or anything like that to record labels," he told us when we met him on his promotional tour for his latest film Justin Bieber: Never Say Never. "I was just doing regular stuff at home and I just posted videos online without purpose. I would never be here if it wasn't for the Internet and YouTube." But it isn't just YouTube that helps Justin's popularity. He also updates his Twitter account (@Justin-Bieber) regularly and has about 8.8 million followers. In fact, he's so popular that Justin was responsible for 3% of the site's activity at one time and so popular that entire racks of servers on Twitter were devoted to him. In light of his story, many young, aspiring artists are now taking advantage of Twitter and YouTube. Both these sites can help artists build fan bases in the hope that they'll become the next big thing. Justin added, "I think my story brings hope to people and I think that's very important. The only thing holding you back is yourself. Never say never."
Question: What is the best title for the passage?
Options: (A) A famous young man (B) YouTube---A popular website (C) Justin's way to success (D) Social media is the most important
Asnwer: C
[EX A]: Yes

[EX Q]: Article: A recent study suggests that teens' relationship with parents, friends and teachers may have a lot to do with why they don't get a good night's sleep. David Maume, a sociologist and sleep researcher, analyzed federal health data, which interviewed 974 teenagers when they were 12, and then again at 15. He found that family dynamics have much to do with how well kids sleep. Teens, who had warm relations with their parents and felt like they could talk to them or their parents were supportive of them, tended to sleep better. However, families that were going through a divorce or a remarriage tended to affect teens' sleep. And problems at school also affected teens' sleep. Feeling safe at school and having good relations with teachers tended to promote better sleep. As did good relationships with friends. Kids who took part in sports or other positive social activities or shared similar academic goals with their friends were also more likely to get a good night's sleep. These add up to what makes lots of sense: a general feeling of well-being helps teens sleep. If we're happy and contented, we're much more likely to sleep better than if we're sad and anxious. Now, of course, teens can hardly resist being drawn to their computers and social networking. Maume also found that when parents were strict not only about bedtime, but also about limiting technology, kids slept better. It's a finding that seems obvious, but parents really do matter when it comes to health habits of their teenagers. Clearly, teenagers aren't getting 9 to 10 hours a night, which puts them at risk for all the consequences of lack of sleep, including poor academic performance, colds and stress.
Question: What is the passage mainly about?
Options: (A) Teens' sleep is linked to their relationship with people around them. (B) Lack of adequate sleep puts teens at risk of many bad consequences. (C) Modern technology has something to do with teens' sleep problems. (D) It is necessary for teens to join in sports and positive social activities.
Asnwer: C
[EX A]: No

[EX Q]: Article: Across countryside, non-food crops are growing alongside wheat.Some are used in new alternatives to plastics and other materials, but others will simply be burned. Burning crops is becoming more popular because it is good for the planet.Doing so is also cheaper than burning fossil fuels.As more land is devoted to non-food crop production, the economics of crops for fuel are likely to become even more favorable. Humans have been burning such biomass--organic materials from plants or animals-- since they discovered fire.But that burning fossil fuels could have catastrophic consequences has brought biomass back into fashion. Even allowing for emissions of carbon dioxide from fuel used in planting, harvesting, processing and transporting biomass fuel, replacing fossil fuel with biomass can typically reduce greenhouse gas emissions by more than 90 percent. Power stations around the world are experimenting with forms of biomass to add to their coal or oil, with encouraging results.Indeed, power companies could profit by turning to biomass, especially when the subsidies many governments offer for using renewable energy are taken into account. Farmers can benefit from growing biomass.In Europe, the reduction of subsidies for certain crops is exposing farmers to market forces.Instead of being paid for whatever they produce, farmers must seek a clear demand for their product.Many believe that the demand for alternatives to fossil fuels could be just such a driver. But while biomass offers a variety of potential alternatives, the world's infrastructure has developed around burning fossil fuels to such a stage that switching to biomass involves a change in conception that many companies have not accepted. Also, there are problems with using biomass.Although most coal-fired power stations could take a small amount of their fuel from biomass without significant adjustment, few are built to run on biomass alone.Burning some forms of biomass also causes environmental problems.Oils and waste can be smelly, while wood produces smoke unless burned properly. The supply chains for fossil fuels are set up well, but those for biomass are just the beginning. Sources of supply for biomass rely on farm production and can therefore be less reliable. They are necessarily limited and it wouldn't make sense to turn a very large amount of valuable agricultural land away from food crops.But as the world adjusts to the need to control greenhouse gas emissions, these problems may receive more attention.
Question: What do we know about biomass?
Options: (A) It is a useful way of burning crops. (B) It is plant and animal matter used to provide power. (C) It is a new alternative to be used widely. (D) It is a popular approach to fighting against pollution.
Asnwer: A
[EX A]:
No