题目内容：

    Life isn’t fair. That universal truth is something that children seem to understand at a young age，but the path through which they develop a sense of what’s fair and what isn’t—and how they act on injustices—is something that has been a puzzle for social scientists.

To find out which aspects of fairness might be universal and which might be culturally driven，a team of scientists traveled to seven countries to study how different groups of children play fair. The researchers designed an “inequity(不公平) game” that they used to test 866 pairs of children aged 4 to 15 in Canada，India，Mexico，Peru，Senegal，Uganda and the United States.

Two children of the same gender(性别) and similar age were seated across from each other and were offered some candy. Sometimes the allocations were equal and sometimes they were not. One of the two children got to decide whether both of them accepted the allocation or rejected it. The experiment was set up to work through a machine that required the child to pull one handle to accept the deal—resulting in the candy being poured into a bowl for two children each—and a different handle to reject it—pouring the sweets into a third bowl where neither one would get to eat them.

In all seven countries，the results indicated a rejection of disadvantageous inequity. That is，when the children were allocated less candy than others，they tended to route all the treats into the bowl that no one could access. The reactions to advantageous inequity were more mixed. Children in only three countries—the United States，Canada and Uganda—had a tendency to reject unequal distributions of candy when they got more than others. “Given that these countries tend to stress principles of equality，it is possible that children in these countries face social pressures to learn these principles earlier，” the researchers wrote.

1.What does paragraph 3 talk about?

A.The players of the game.

B.The tools of the game.

C.The rules of the game.

D.The results of the game.

2.Which factor can significantly affect kids’ attitude to advantageous inequity?

A.School education.

B.Social environment.

C.Parents’ influence.

D.National development.

3.What is the author’s purpose in writing the text?

A.To discuss the importance of fairness.

B.To draw readers’ attention to inequity.

C.To offer kids some tips for rejecting inequity.

D.To introduce a study on how kids play fair.