(单选题)

We know from the passage that people’s brains will be more active when ______．

A.the task is much easier

B.the blood flow is tracked

C.people begin to choose colors

D.the task is more difficult

参考答案：D

参考解析：

推理判断题。根据第五段第四句“For the Asians, the attention areas lit up more during the harder task also—estimating the line’s length without comparing it to the square”可知，任务更加艰巨时，人们的大脑会更加活跃。故选D。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语