❓ 题目 According to the passage, what is a primary reason why some scientists oppose the formal recognition of the Anthropocene as a geological epoch?
- A. A. Human activities have not left any significant markers on the planet.
- B. B. The proposed markers are not unique enough to distinguish it from the Holocene.
- C. C. Human impacts are not globally synchronous, making a clear boundary difficult to establish.
- D. D. The term 'Anthropocene' was coined by non-scientists and is not scientifically rigorous.