❓ 题目 According to the passage, what is the primary reason for the debate over the start date of the Anthropocene?
- A. A. The lack of any clear physical evidence of human impact
- B. B. Disagreement over which natural event should define the boundary
- C. C. The difficulty in selecting a point where human influence became a dominant geological force
- D. D. Opposition from the International Commission on Stratigraphy