input: OPTIONS:
- The content of the journal Cognitive Development.
- The famous works of Dr. Gattis.
- Babies understanding their mothers through tone.
- Babies having the potential to learn language well. Now, answer this question: Read the following article and answer the question. Article: Babies understand what their mothers say, even when they speak a language their children have never heard before, scientists claim. The researchers found that one-year-olds reacted in exactly same way to their mothers' voices regardless of whether they were speaking English or Greek, showing what mothers have long known - that babies pick up on tone of voice rather than the words themselves. The researchers, from Cardiff University's School of Psychology, observed babies as they watched their mothers perform actions with toys using the English words "whoops" and "there". The scientists studied reactions from one-year-old babies to their mums' voices even when they were speaking both English and Greek, and keeping the same tone of voice. The academics found that babies reproduced the same reactions regardless of whether they knew the language. Study leader Dr Merideth Gattis of Cardiff University's School of Psychology says, "What this work showed was that children could have access to understanding simply through tone of voice. We did 'whoops' and 'there' in two languages and got exactly the same results." The research, published in the journal Cognitive Development, was conducted on 84 babies aged between 14 and 18 months, over the course of a year, with none of the babies having any previous exposure to Greek. Dr Gattis says that children respond to tone clues in their parents' voices from an early age. She says, "Tone of voice is a really useful signal of what someone is thinking. We never have direct access to other people's minds, except the signals in language that they give out." She says the study shows that it is less important what parents say than how they say it. Dr Gattis adds, "A child may ask if you like his / her drawing, for example. You might say yes, but if you don't sound enthusiastic, the meaning may not get across." Before children begin to speak, parents should use exaggerated tone when speaking to them. Question: What's the text mainly about? Answer:
A:
output: Babies understanding their mothers through tone.

input: OPTIONS:
- Father Christmas and John Horsley
- the greeting cards
- the Christmas cards
- the New Year's cards Now, answer this question: Read the following article and answer the question. Article: Today, we send millions of Christmas cards every year. But in fact the Christmas card is a ly modern invention. In the Middle Ages, European wood engravers produced prints with religious themes. But the first real Christmas card, as we understand the term today, was designed in London, England in 1840. It went on sale in 1843. The designer was John Callott Horsley, a well- known British painter and member of the Royal Academy. He designed the card at the suggestion of his friend Sir Henry Cole, who was the first director of the Victoria & Albert Museum. Horsley produced 1,000 cards and offered them for sale at 1s (one shilling) each. They were printed on stiff card and coloured by hand, with the greeting: "A Merry Christmas and a Happy New Year to You". The card shows three pictures: in the center, a family party; to one side the hungry receiving food; to the other side the poor being clothed. Puritans immediately _ the card, since it showed people drinking in the family party. But with most people the idea was a great success and the Christmas card quickly became very popular. Christmas cards were not the first greetings cards. Since 1796, with improvements in printing, merchants had been sending cards to their customers offering "best wishes" for the new year. In many countries, Christmas cards gradually became even more popular than New Year's cards. As Christmas is the birthday of Jesus Christ, cards often show scenes of His nativity. Others show images connected with Christmas such as wintry scenes of snow-laden pine, Father Christmas card is "Merry Christmas", but many other greetings are also used, such as "Happy Xmas" or "Happy Noel". Question: The text is written to introduce to us _ . Answer:
A:
output: the Christmas cards

input: OPTIONS:
- It can use a lot of information all over the world.
- It can ensure that you will never be late for work.
- It helps drivers see clearly what happens on the road.
- It helps drivers know the road conditions ahead of time. Now, answer this question: Read the following article and answer the question. Article: In Los Angeles, drivers spend sixty-one hours every year stuck in traffic.These drivers know all too well how bad the traffic can be."There're too many cars, and you can't move around a lot." Professor Cyrus Shahabi also knows about traffic jams.He lives more than 65 kilometers from his office at the University of Southern California, in Los Angeles.He is always late even with the help of a navigation system. He decided to develop a program called ClearPath for that.He says his program uses historical data to predict traffic conditions even before the driver leaves the house. "What's unique is that we use a lot of data that's currently become available including traffic data, weather data, and we analyze that so that we can predict what's going to happen in front of you when you leave home." Professor Shahabi says his system does more than just respond to current traffic conditions.With ClearPath, he says, a driver can decide what time he wants to leave, and ClearPath will give the fastest route.It looks at the entire road network, including surface streets as well as highways, before the driver hits the road.Professor Shahabi hopes to have ClearPath available nationwide and overseas once they can collect traffic data from other cities. "I always thought thatLos Angeles had the worst traffic, but now I know that Shanghai, Beijing, Seoul, Tokyo, believe it or not, Singapore, Hong Kong certainly are examples that can immediately use this." Professor Shahabi hopes to share this new technology with companies that already have navigation systems, such as Google and Apple. Question: What is unique about ClearPath? Answer:
A:
output:
It helps drivers know the road conditions ahead of time.