❓ 문제 According to the passage, what is the main reason some scientists oppose the mid-20th century as the start of the Anthropocene?
- A. A) They believe human influence was negligible before the Industrial Revolution.
- B. B) They argue that earlier human activities like agriculture also had significant global effects.
- C. C) They think the term 'Anthropocene' should only be used for cultural history.
- D. D) They doubt the existence of plutonium isotopes in sediment layers.