单选题 Why do most intelligence tests combine all three types of questions in equal numbers?

A、 Because everyone have the same chance in this way.
B、 Because the IQ is an average and doesn't say any thing about special abilities.
C、 Because they are the only three types of questions that can be used at present.
D、 Both A and B.

【正确答案】 A

【答案解析】本题是一道细节题。要求考生回答为什么智力测试包含的三种类型的问题数量一样，此题的答案就在第三段中so that everyone has the same chances，whether he or she is better at one type or another，所以答案是A)。