input with options: Read the following article and answer the question. Article: Large areas of the Amazon rainforest were grassland until just 2,000 years ago when it has been found. Researchers say the find gives new light on the Amazon's history - and show it was a savannah rather than the high forest it is today. They believe much of the area was grassland until a natural shift to a wetter climate about 2,000 years ago let the rainforests form, according to a study that challenges common belief that the world's biggest tropical forest is far older. The arrival of European diseases after Columbus crossed the Atlantic in 1492 may also have sped up the growth of forests by killing the local people farming the region, the scientists wrote in the US journal Proceedings of the National Academy of Sciences (PNAS). "The dominant ecosystem was more like a savannah than the rainforest we see today," John Carson, lead author at the University of Reading in England, said of the findings about the southern Amazon. The scientists said that a shift toward wetter conditions, perhaps caused by natural shifts in the Earth's orbit around the sun, led to growth of more trees starting about 2,000 years ago. The "findings suggest that rather than being rainforest hunter-gatherers, or large-scale forest clearers, the people of the Amazon from 2,500 to 500 years ago were farmers," the University of Reading said in a statement. Carson said that perhaps a fifth of the Amazon basin, in the south, may have been savannah until the shift, with forests covering the rest. In one lake, Laguna Granja, rainforest plants only took over from grass as the main sources of sediments about 500 years old, suggesting a link to the arrival of Europeans. And understanding the forest could help solve puzzles about climate change. The Amazon rainforest affects climate change because trees soak up heat-trapping carbon dioxide as they grow and release it when they rot or are burnt. Brazil has sharply slowed deforestation rates in recent years. Question: What was the effect of the arrival of the Europeans? Answer:
OPTIONS:
- The local people died out.
- The climate became wetter.
- The forests growth sped up.
- More people farmed the area.
output: The forests growth sped up.

input with options: Read the following article and answer the question. Article: Not being the best but touching the limits of your ability. This belief came from my third grade teacher, the most trusted and loved person in my life. Mr. Myrus was always perfectly dressed and spoke with the conviction that talking to small kids didn't mean that he had to sacrifice proper pronunciation or grammar. And he was demanding. Oh, he wasn't unreasonable or cruel; he simply felt that no matter what your best was, you should achieve it. As luck would have it, I met him again as my eighth grade math teacher. I was not, nor ever will be, gifted in math. And thirteen-year-old girls do not have the energy to devote to something like square roots . I remember our struggles, "I don't know the answer. I can't do it.!" "Perhaps you don't know the answer," he would say quietly. "Do you think we might figure it out together? How do you know what you can do until you try?" Mr. Myrus lived around the corner, and I would often stop by to talk while he worked in his wood shop. In this room of sawdust, wood chips, and the smoke from the woodburning stove, I felt respected and valued as a person. I knew there was someone who liked me for who I was, someone who, while he always wanted me to do my best, let me know that if I had really tried, that was enough. Mr. Myrus was my teacher and my friend. He taught me to be kind. He taught me my own value. He taught me about honor, about truth, and about doing my best--and that all feelings and beliefs have dignity and deserve respect. And of all the things I know, this I believe: We can't all be "the" best, but we can, each of us, be our best, and I know that's true because Mr. Myrus told me. Question: Why did the author often visit Mr. Myrus wood shop? Answer:
OPTIONS:
- She could reach the limits of her ability.
- She could help Mr. Myrus with his work.
- She could get a sense of self-respect there.
- She could get help for her study problems.
output: She could get a sense of self-respect there.

input with options: Read the following article and answer the question. Article: Ever feel like there aren't enough hours in the day? A group of timechallenged Canadian women are wishing for a 25hour clock. Jessie Behan, president of the 25th Hour Coalition which is a group of Canadian women who have changed to a longer day, said the struggle for women to maintain worklife balance motivated her to research the body's natural clock."Many of my girlfriends are having kids,getting married, and I see the sufferings of dealing all that when you're a working woman,"she said."Women like myself are sick of living their lives by a 24hour clock." A 2007 study by Charles Czeisler found a switch to longer days could be beneficial, especially for frequent travelers, shift workers, astronauts and those who experience trouble sleeping or waking. In a similar study, Czeisler showed the body's natural clock averages 24 hours and 11 minutes in both young and older people.The current 360degree clock has 720 minutes, giving each minute 0.5 degree.With the new 25hour day, 30 minutes is added to each 12hour period making each minute 0.48 degree. While still a relatively small movement-the 25th Hour Coalition has 160 Facebook members, Behan is hoping for large changes."The goal is to get as many women on board; there's no harm in just trying it out and seeing.If it gets big, maybe the government will decide to standardize it." A recent online survey by Reader's Digest, which included 150 people in each of the 13 countries, suggests it's not just Canadians looking for longer days.Readers were asked"what would you do with an extra hour"if given a choice between sleep, work, exercise and family time.In Spain, half of respondents said they'd like an extra hour in the day to devote to family time.The same was found for respondents in Brazil, the US and Britain, who chose family time over sleep, which came in at a close second.Only in India did work top the list with 50 percent of respondents claiming they could use an extra hour at the office. Question: Some Canadian working women are campaigning for the 25hour day in order to _ . Answer:
OPTIONS:
- have more chances at work
- keep a balance between life and work
- experience something new
- have a better sleep
output:
keep a balance between life and work