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.

[EX Q]: Article: By 2050 there will have been an extra 2.5 billion people on earth. And what will they eat? To solve the problem, we should have to double our food production. We can also develop a diet of algae , insects and meat grown in laboratories. Algae can grow very quickly at sea, in polluted water and in places that would normally kill food crops. They are already eaten widely in Japan and China and they are eaten by almost everything from shrimps to blue whales. They can fix CO2 in the atmosphere and provide fats and sugars. Man-made meat looks like meat, feels like meat and it is meat, although it's never been from a living, breathing animal. Instead, it is grown from cells in big containers. Moreover, studies show that producing man-made meat will use far less water, energy and land. China has developed "green super rice", a series of rice types which produce more grain and have stronger ability to fight against floods, salty water, insects and disease. We used traditional plant breeding techniques to cross-breed more than 250 rice types. Green super rice, which is enough to feed an extra 100 million people, will be planted widely in the coming years. Insects like ants are not on most European menus but at least 1,400 kinds are eaten across Africa, Latin America and Asia. Now, with rising food prices and worldwide land shortages, such insects are getting more and more popular. Not only are many insects rich in protein , low in fat and high in Ca and Fe, but insect farms need little space. And they can grow well on paper, algae and industrial wastes.
Question: In order to exist in the future, people have to _ .
Options: (A) move to other planets (B) produce rain in laboratories (C) build new laboratories for food research (D) increase the food production or look for other food sources
[EX A]: D

[EX Q]: Article: While others look away from trouble, this lady digs in and gets to work. Gretchen Buchenholz, the native New Yorker and mother of six, has worked on behalf of needy and margin1alized families for years in the city. She does everything from buy groceries for homeless families to start schools for children. In 1974 she founded Merricat's Castle, a nursery school that opened its doors to kids of all racial and economic backgrounds, the able-bodied as well as those with disabilities or terminal illnesses. She founded the Association to Benefit Children (ABC), the nonprofit group, some 20 years ago. The story of how she started ABC is pretty amazing. In 1984 she was on her way to a government office to get a day-care permit when, by accident, she entered a room where homeless families were waiting to be placed in a " welfare hotel." She saw three bare cribs with babies lying in them. The children wore no diapers (their parents couldn't afford them), and the room was filthy . After talking to the parents and learning that they and their children were hungry, Gretchen marched out and bought bread, peanut butter, apple juice and diapers. Then she started making phone calls. She dialed the American Red Cross, City Hall and The New York Times. Gretchen has made many people see that we need to recognize these children are not different from our own, and we need to join in and help. Too often, people look away from suffering. But she sets us an example that we should gain strength to do something about it.
Question: She went to the government office _ .
Options: (A) to help those homeless people in the room (B) to apply for a permit for ABC (C) to call on the government to help those homeless children (D) to get permission to look after babies during the day
[EX A]: D

[EX Q]: Article: Even if you are a good high-jumper, you can jump only about seven feet off the ground. You cannot jump any higher because the earth pulls you hard. The pull of the earth is called gravity. You can easily find out the pull of the earth. If you weigh yourself, you will know how much gravity is pulling you. Since there is gravity, water runs down hill. When you throw a ball into the air, it falls back down. Because of gravity, you do not fall off the earth as it whirls around. Then, can we get away from the earth and go far out into space? Now you can do it, because spaceships have been invented. Then spaceship will go so fast that it can escape the earth's gravity and carry you into space.
Question: In this passage, the word "gravity" means _ .
Options: (A) the pull of everything. (B) the force of attraction among objects. (C) the force which attracts objects towards the centre of the earth (D) the force which attracts the earth towards the sun.
[EX A]:
C