原题
录音 1
What point does the speaker emphasize at the end of the talk?
AGeological formations are the most reliable historical records.
BThe Maya civilization was more advanced than previously believed.
CModern research has resolved all questions about the Maya decline.
DChanges in natural conditions can have broad effects on societies.
正确答案：D
解题思路
老师暂未填写解题思路。