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.

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.
C

Article: Shoppers who have cut back on purchases in the worrying U.S. economy are likely to continue their conservative shopping habits even if the economy improves, according to a new study. That signals continued bad news for retailers , who have been struggling to respond to a great cutback in spending as consumers have opened their wallets only for basic items, while cutting back on unimportant purchases. The report, which estimates retail sales growth to be flat this year, found that three-quarters of respondents to a monthly survey of 4,000 consumers said they had shifted their shopping behaviors because of the economy. Most said they were making do with less or going without some favorite items. "The habits learned during this economic crisis have the potential to permanently change the mind-set of consumers," the report said. "The vast majority of shoppers who are changing their near-term shopping behavior say they plan to continue them as the economy improves." To ease the consumer discomfort, smart retailers will focus on downsizing, the report said, as adding stores to an already crowded retail landscape is out of fashion. It came up with smaller initiatives to build shopping buzz, such as limited editions of products or having existing stores target local markets. The report also forecast that retailers will increasingly focus on private brands to attract cost-conscious shoppers, while adding complementary categories of goods to their stores to make one-stop shops for consumers. While warehouse clubs and super centers are expected to fare the best in the weak environment in 2009, discount department stores and supermarkets will be the weakest, the report warned. Sales of clothes, though expected to rebound in 2010, will be the hardest hit and slowest to recover.
Question: The current shopping behavior in the US is becoming _ .
Options: (A) arbitrary (B) protective (C) conservative (D) aggressive
C

Article: While many young people may resist getting a "real job" or becoming independent, these are the things that make you happy and give you purpose. Some people underestimate the satisfaction of working, thinking they'll be miserable. The 20-somethings that do work are happier than those who don' t or are underemployed. If you invest in your career early,you'll have longer to build it up. 70% of wage growth happens in the first 10 years, so you need to get the best job you can get and negotiate your salary. No one can be sure that people who will wait until their 30s to get going are expecting to experience later to catch up with those of their ages. Many 20-somethings don't know what they want to do, so they hang around the house or in. low-level jobs waiting for the spirit to move them. Not making a choice is a choice. These 20-somethings think they are keeping their options open, but they are actually closing doors. Resumes start to look thin, their peers begin surpassing them and they may get stuck in underemployment. It will take about 10,000 hours(or about five years)to really master their jobs. If you're wondering why colleagues seem so smart and confident, it's partly because they've been doing it longer. Young people should learn as much as they can in their first jobs and remember it will take some time to really get good. The 20-something brain is still developing, which is in charge of critical emotion with reason. This, _ less on-the-job experience, means 20-somethings are more sensitive to surprise and criticism. They are more likely to take feedback personally. Step back and get some perspective. You're not going to be fired because your boss is angry. Hear the criticism and learn from it. The brain doesn't fully mature until your mid-20s, particularly the parts that plan for the future and manage emotions. That doesn't mean you should sit around and wait for it to develop. In. fact, what you learn and experience in your 20s becomes hardwired into your brain and this is the best chance you have to change your brain and change how you think and react. What people do in their 20s determines who they'll be as adults.
Question: What is the best title of the passage?
Options: (A) How You Spend Your 20s Will Define You. (B) The 20-something Brain Remains To Be Developed. (C) Young People Need Employment And Experiences. (D) Becoming Mature Should Invest In The Career.
A