❓ 题目 According to the passage, what is a primary reason why critics oppose the formal recognition of the Anthropocene as a geological epoch?
- A. A) Human-induced markers are not distinct enough to be detected in the rock record.
- B. B) The proposed markers are not globally synchronous, lacking a clear boundary.
- C. C) The term 'Anthropocene' is too recent and lacks historical precedent.
- D. D) Geological epochs must be defined by fossil appearances, not chemical markers.