❓ 题目 According to paragraph, which of the following is a reason some geologists oppose formalizing the Anthropocene as an epoch?
- A. Human activities have not produced any measurable changes in the environment.
- B. The changes associated with human activity are not yet visible in a distinct rock or sediment layer.
- C. The term 'Anthropocene' is too vague to be used in scientific discussions.
- D. Geological epochs are traditionally defined only by natural events, not human actions.