❓ 質問 According to the passage, which of the following is cited as evidence for the mid-20th century start of the Anthropocene?
- A. A. The widespread use of synthetic chemicals such as PCBs
- B. B. A distinct radioactive signature from atomic bomb tests found in sediments
- C. C. The advent of agriculture leading to deforestation and soil erosion
- D. D. The formation of glacial deposits and fossil assemblages