❓ 質問 According to the paragraph, which of the following is a reason why some geologists oppose the formal recognition of the Anthropocene as a geological epoch?
- A. A. Human activities have not yet caused significant changes to Earth's systems.
- B. B. The radionuclide markers from nuclear tests are not globally distributed.
- C. C. The human-induced changes are still ongoing and lack a stable stratigraphic boundary.
- D. D. The concept of the Anthropocene is only used in non-scientific disciplines.