Does solving a math problem give you a headache? Do you feel nervous when you sit a math exam? For most students, math can be tough but scientists have proved that math problems can actually trigger physical pain. Scientists came to his conclusion with an in-depth experiment, which was published in the Public Library of Science One journal. They began by finding out how much participants fear math. Those involved were asked a series of questions such as how they feel when they receive a math textbook or when they walk into a math lesson. Based on their answers, participants were divided into groups. One group was made up of people  who  were particularly afraid  of  math  and participants  in  the other  group were  more comfortable with the subject. Both groups were then given either math tasks or word tasks. When a math task was going to come next, a yellow circle would appear but when a word task was soon to come, a blue square would be shown. Using a brain-scan machine, scientists noticed that whenever people from Group One saw a yellow circle, their brain would respond in a way similar to when their body is feeling pain. It was like the pain they would fee, for example, if they burnt their hand on a hot stove. But they reacted less strongly when they knew that they would be faced with a word task. However, scientists saw no strong brain response from people in the second group. Math can be difficult, and for those with high levels of mathematics-anxiety (HMA), math is associated with tension, apprehension and fear. "When you are really thinking about the math problems, your mind is racing and you are worrying about all the things that could go wrong," explained Ian Lyons from University of Chicago, US, leader of the study. "The higher a person's anxiety of a maths task, the more he activated brain regions associated with threat detection, and the experience of pain." More interestingly, the brain activity disappeared when participants actually started dealing with the math tasks. "This means that it's not that math itself hurts; rather, the anticipation of math is painful," Lyons said. Based on the study, scientists suggested that things could be done to help students worry less and move past their fear of math, which might mean they perform better in tests. In the first stage, scientists ask participants some questions to                  _  .
see whether math hurts test their endurance observe how their brain response find out how much they fear math of pain
Question: Does solving a math problem give you a headache? Do you feel nervous when you sit a math exam? For most students, math can be tough but scientists have proved that math problems can actually trigger physical pain. Scientists came to his conclusion with an in-depth experiment, which was published in the Public Library of Science One journal. They began by finding out how much participants fear math. Those involved were asked a series of questions such as how they feel when they receive a math textbook or when they walk into a math lesson. Based on their answers, participants were divided into groups. One group was made up of people  who  were particularly afraid  of  math  and participants  in  the other  group were  more comfortable with the subject. Both groups were then given either math tasks or word tasks. When a math task was going to come next, a yellow circle would appear but when a word task was soon to come, a blue square would be shown. Using a brain-scan machine, scientists noticed that whenever people from Group One saw a yellow circle, their brain would respond in a way similar to when their body is feeling pain. It was like the pain they would fee, for example, if they burnt their hand on a hot stove. But they reacted less strongly when they knew that they would be faced with a word task. However, scientists saw no strong brain response from people in the second group. Math can be difficult, and for those with high levels of mathematics-anxiety (HMA), math is associated with tension, apprehension and fear. "When you are really thinking about the math problems, your mind is racing and you are worrying about all the things that could go wrong," explained Ian Lyons from University of Chicago, US, leader of the study. "The higher a person's anxiety of a maths task, the more he activated brain regions associated with threat detection, and the experience of pain." More interestingly, the brain activity disappeared when participants actually started dealing with the math tasks. "This means that it's not that math itself hurts; rather, the anticipation of math is painful," Lyons said. Based on the study, scientists suggested that things could be done to help students worry less and move past their fear of math, which might mean they perform better in tests. In the first stage, scientists ask participants some questions to                  _  .
A. see whether math hurts
B. test their endurance
C. observe how their brain response
D. find out how much they fear math of pain
Answer: