❓ 質問 According to the passage, which of the following is a reason why some scholars oppose the formal recognition of the Anthropocene as a new geological epoch?
- A. Human markers are not detectable in most sedimentary layers.
- B. Human environmental impact has been ongoing for thousands of years, making a clear boundary difficult.
- C. The concept lacks relevance to contemporary policy debates.
- D. Nuclear test radionuclides are the only proposed marker, which is insufficient.