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: Many people say dolphins are very intelligent. They seem to be able think, understand, and learn things quickly. But they are smart like humans or more like cats or dogs? Dolphins use their brains differently from people. But scientists say dolphin intelligence and human intelligence are alike in some ways. How? FACT 1: Talk to Me Like humans, every dolphin has its own "name". The name is a special whistle . Each dolphin chooses a specific whistle for itself, usually by its first birthday. Actually, scientists think dolphins, like people, "talk" to each other about a lot of things, such as their age, their feelings, or finding food. And, like humans dolphins use a system of sounds and body language to communicate. But understanding their conversations is not easy for humans. No one "speaks dolphin" yet, but some scientists are trying to learn. FACT 2: Let's Play Dolphins are also social animals. They live in groups called pods, and they often join others from different pods to play games and have fun ---just like people. In fact, playing together is something only intelligent animals do. FACT 3: Fishermen's Helpers Dolphins and humans are similar in another way: both make plans to get something they want. In the sea of southern Brazil, for example, dolphins use a interesting strategy to get food. When fish are near a boat, dolphins signal to the fishermen to put their nets in the water. Using this method, the men can catch a lot of fish. What is the advantage for the dolphins? Why do they assist the men? The dolphins get to eat some of the fish.
Question: What is the text mainly about?
Options: (A) The comparison between dolphins and humans. (B) The relationship between dolphins and humans. (C) Different types of dolphins. (D) The habitual behavior of dolphins.
[A]: A

[Q]: Article: Do your parents smoke? Where do they smoke - outside, at work or at home when you are around? According to a survey published in the journal Academic Pediatrics, an alarming number of US parents are still risking their children's lives by smoking in front of them. Half of all children aged 6 to 19, even those with asthma , have been exposed to second-hand smoke in the country, reported Reuters. "It's well known that smoking kills, but many smokers still don't realize the damage their smoke causes to those around them," Dame Sally, Chief Medical Officer for England, was quoted by the Independent as saying. Tobacco smoke contains more than 7,000 chemicals, hundreds of which are poisonous. About 70 of them can cause cancer, not to mention other diseases, according to the US Centers for Disease Control and Prevention. What's most scary is that there is no safe level of contact with second-hand smoke---even "low-level" exposure can be harmful to one's health. And "low-level" means when a parent or family member smokes in another room or even outside. While second-hand smoke can be harmful to people of all ages, children face a greater risk than adults: they have smaller lungs; they breathe more quickly; and they have less developed immune systems. Also, young children have little control over their surroundings. Babies can't move to another room because the air is smoky. They depend on the adults in their lives to make sure that their environments are safe. Recent years have seen second-hand smoke exposure drop---but for adults rather than kids, because policies have been started around the world to ban smoking in public places such as offices, bars and restaurants. However, "Children tend to be exposed to second-hand smoke in homes and cars, and these places are not included in most laws and policies," Amy Ferketich, a researcher at The Ohio State University, US, told Reuters. So what can we do to limit children's exposure to second-hand smoke? Parents should stop smoking for good. But if they can't, they should never smoke---or let others smoke---around their children.
Question: Which of the following is TRUE according to the article?
Options: (A) Half of the children ages 9 to 18 in the US have parents who smoked at home. (B) Most smokers in the US don't care about the effects that smoking can have on those around them. (C) Dame Sally believes many parents who smoke in front of their kids have no idea of the damage that they are doing. (D) Hundreds of chemicals contained in tobacco can cause cancer.
[A]: C

[Q]: Article: My grandfather had a small farm where he raised beef and some grain for feed. He also worked diligently as a factory laborer and country pastor. He was a good neighbor and well-respected for honoring his word. When harvest time came, he'd piece together his old one-row corn picker and oil it up for the season. All his life he worked hard, helped others, and you could count on him to keep his promises. He had promised to harvest a few ribbons of corn on a friend's farm, but after harvesting his own corn, Grandpa's little corn picker coughed and quit. It would be out of commission until a particular part could be ordered, but that would take far too long to help this year. The factory where Grandpa worked began to require overtime. In order to keep his job there he had to leave the farm before dawn and get home until well after sunset. One autumn night, while harvest time was running out, he and his wife sat at the kitchen table and trying to figure a way out of their dilemma. "There's nothing you can do," said my grandma. "You'll just have to tell him that you can't help with the corn this year." "Well that just doesn't sit well with me," said my grandpa. "My friend is depending on me. I can't exactly let my neighbor's harvest rot in the field, can I?" "When do you think you'd have time to do it?" she asked. "With the overtime you've been working you'd be up all night." "I know of one night that I could do it!" he said, running to the bookshelf. He grabbed the Farmer's Almanac and started flipping through the pages. "Aha! There's still one more full moon in October." They say it's called the harvest moon because it gives farmers more light and more time to collect their crops. And so a few days later, after a long shift at the factory, my grandpa made his way to the field where my grandma met him in the truck with dinner. The weather was cold but clear, and the moon was brilliant. He worked through the night to keep his word. I know this story well, so sometimes, when I'm tempted to cut corners or to put off responsibilities, I think of my grandfather with his scythe cutting wide arcs of corn in the light of the harvest moon.
Question: Which was the main trouble my grandfather had in helping his friend?
Options: (A) His wife objected to his helping his friend. (B) His corn picker ran out of oil. (C) His corn picker broke down. (D) The weather was not favorable.
[A]:
C