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.

Q: Article: Testing new drugs for safety and effectiveness is a costly process in the United States. It also can take:lot of time. Some scientists are now designing silicon computer chips that act like human organs. The scientists think they have found a way to make the process faster and more economical. The silicon computer chips are smaller than a child's hand. Each one has living cells that act and react like a human organ. The chips are being created as part of a program to test the safety of drug compounds. It is called the Tissue Chip for Drug Screening Program. It is a project of the US National Center for Advancing Tmnslational Sciences, or NCATS. Danilo Tagle is the center's Associate Director. He says a three-dimensional computer chip can be designed to act like a human lung. Some computer chips contain very small models of the human digestive system. They copy the real function or duties of the human stomach and intestine , moving when breaking down food. Drugs are added to the tiny organs for testing through instruments known as micro-tubes. Experiments with the tissue chips have produced more detailed information than tests using animal or cell models. NCATS just announced$17 million in grants to develop an entire human organ system over the next three years.
Question: Why are scientists designing silicon computer chips acting like human organs?
Options: (A) To treat the patients whose body organs don't work well. (B) To examine the health condition of human organs. (C) To make testing new drugs faster and cheaper. (D) .To further study the function of human organs.

A: C
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Q: Article: When I was growing up, 16 was always a magical age, a symbol of maturity, responsibility and of course more independence and freedom. I sat through the hours of Driver's Ed classes eager to get out on the road. I couldn't wait to get my driver's license. But it's a different story for today's teens. In January, the U.S. Department Transportation released 2012 data that showed only 30.7 percent of U.S. teens got their license at age 16, Twenty years before, that number was almost 45 percent. There are numbers of reasons for the fall - off. The growing responsibilities like paying for insurance and high gas prices discourage teens from getting behind the wheel. Plus, many teens today are so busy with homework, endless hours of activities and part-time jobs, that finding the time for Driver's Ed classes may be more difficult that ever. In addition, many states have raised the driving age, or restricted when teens can drive and who they can have in the car. Parents may also be making their own personal restrictions until they feel their teens are responsible enough to drive safely. Driving is part of the American culture, but it's not the central focus like it was 25 years ago. They have so many other things to do now. One of the more interesting factors delaying teens driving might be the change of their social life. Today, teens need to look no further than Face book or other social networking sites to connect with their friends. There is simply less need, maybe less desire, to be able to grab the keys and go. Michelle Wei got her license as a senior in high school because her digital social life made it easy no to drive. "If I couldn't get a ride to see my friend who lives a town over," the 19-year-old said, "I could talk on IM or Skype." Research has shown that these online relationships can lead to higher quality friendships, so it isn't necessarily a bad thing. However, it's important to find a balance. If old face-to-face friendships are good, why not drive to find them?
Question: What does the passage mainly talk about?
Options: (A) Desire to drive on the road declines among American teens. (B) Getting a license costs much more than ever before. (C) Social networking sites are changing the life of American teens. (D) American teens are becoming more responsible than ever.

A: A
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Q: Article: How to make friends Choosing friends Before you make friends,you have to decide who you want to be your friends.Most people like to have friends who like to do the same kind of things as they do.That doesn't mean you have to be exactly like each other,just that you enjoy some of the same things.Think about your favorite things to do and try to talk to your classmates at lunch or rest about your hobbies.You are sure to find at least one person who's excited about the same things that excite and interest you,too. Making friends *The quickest way to make a friend is to smile.When you smile,people think you are friendly and easy to talk to.It may not be easy at first to smile.But you can practice smiling in front of a mirror.When you look at yourself in the mirror,think if you'd rather talk to your smiling face or your usual scared or angry face. *One easy way to start a conversation with someone is to say something nice about them.Think about how great you feel when someone says something nice to you.Doesn't it make you want to talk to him? *Ask your new friends questions about themselves.It's the only way to get to know what they're like and it's the only way they'll know that you are interested in them. *Make sure you have something to add to the conversation,too.When someone asks you a question,do have an answer for them.There is nothing that will stop a conversation quicker than a shrug for an answer. Activities After you've made a friend who shares the same interests with you,it's always fun to plan activities together that you'll both enjoy.Inviting a friend to your house after school is a great way to make your friendship closer. If you know a game your friend likes to play,you can plan to do that together.When you play a computer game,one person is always left sitting with nothing to do but watch.Not fun.
Question: Before you make friends with someone,make sure _ .
Options: (A) both of you are exactly like each other (B) both of you enjoy some of the same interests (C) you have talked to him or her at lunch or rest about your hobbies (D) you have little in common with each other

A:
B
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