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

[Q]: Article: I find some of the ways in which Chinese parents show love for their children rather surprising. Obviously there are some pretty big differences between our behaviors and theirs in this respect. Most Chinese children seem to get whatever they want, from ice creams, sweets and toys to endless attention from the adults around them. Is this a sort of spoiling or love? I wonder. Most westerners would think it is a sort of spoiling rather than love. We think love means educating your children and bringing them up to lead an independent life. That includes learning to accept the fact that he can't get everything he wants. As an adult, he will not always get the quite expensive car he hunts for; she will not always manage to acquire the beautiful dress she longs for. So we try to teach our children early to cope with the disappointment of not getting what they want. I find too much such kind of love for the children can actually spoil them. To my surprise, it seems that the life of a Chinese child is rather hard. Without doubt, the child is the very center of a whole circle of adults, but on the other hand he or she is also expected to start studying according to adults' wishes. Many children of my son's age take piano lessons, painting classes and even English lessons. It looks as if Chinese adults think that just playing without learning anything is a waste of time. So in this respect our children appear spoiled, just because they are allowed to play. But without this sort of play how can western children develop such free and rich imaginations? In fact the connection between this imagination and the creativity is so important in the children's future life.
Question: In which way do most Chinese children seem to be spoiled?
Options: (A) They can be supported by their parents. (B) They can play whenever they want. (C) They need not behave themselves. (D) Their demands can always be satisfied.
[A]: D

[Q]: Article: Do you want to write your password down so that no one can see it, or do you want to send someone a secret message? Knowing how to make an invisible ink message will have you feeling like a secret agent in no time. These are instructions for making invisible ink using baking soda. Difficulty: Easy Time required: A few minutes What you need: Baking soda, Paper, Water, Light bulb, Paintbrush, Measuring cup, Purple grape juice Here's how: There are at least two methods of using baking soda as invisible ink. Mix equal amounts of water and baking soda. Use a paintbrush to write a message onto white paper, using the baking soda solution as "ink". Allow the ink to dry. One way to read the message is to hold the paper up to a heat source, such as a light bulb. The baking soda will cause the writing in the paper to turn brown. The second way to read the message is to paint over the paper with purple grape juice. The message will appear in a different color1. Tips: If you are using the heating method, avoid burning the paper. Baking soda and grape juice react in an acid-base reaction, producing a color1 change in the paper. Grape juice concentrate results in a more visible color1 change than regular grape juice.
Question: is not needed for making invisible ink.
Options: (A) Baking soda (B) Paper (C) Water (D) Ink
[A]:
D