托福阅读

❓ 题目 According to the passage, what is a primary reason why the Anthropocene has not been formally recognized as a geological epoch?

A. A. Human impact is not significant enough to alter geological formations.
B. B. The proposed markers, such as pollen changes, are not globally synchronous.
C. C. The 'Great Acceleration' only began in the 21st century.
D. D. Geologists unanimously agree that it began with agriculture.

B. The proposed markers, such as pollen changes, are not globally synchronous.