❓ 質問 According to the passage, which of the following is a reason why some geologists oppose the formal recognition of the Anthropocene?
- A. A. Human impacts on the environment have been too gradual to leave any detectable geological markers.
- B. B. The proposed start date of the Anthropocene is not universally agreed upon and lacks a clear global boundary.
- C. C. The term 'Anthropocene' is too metaphorical to be used in scientific discourse.
- D. D. The effects of nuclear tests are not considered a significant geological marker.