❓ 题目 According to the passage, what is a primary reason for the controversy over formally recognizing the Anthropocene?
- A. A. The markers of human impact are not yet fully understood by scientists.
- B. B. Human-induced changes are too varied and may not form a clear geological boundary.
- C. C. The Anthropocene is too short a period to be considered a geological epoch.
- D. D. The term 'Anthropocene' was coined by non-geologists and lacks scientific credibility.