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❓ 题目 According to the passage, why do some scholars oppose the formalization of the Anthropocene?

A. Because human impacts occurred at different times in different places, not as a single global event.
B. Because radioactive isotopes from nuclear tests are not present in all geological strata.
C. Because the term is too metaphorical to be used in scientific contexts.
D. Because no synthetic materials have been found in rock layers.

Because human impacts occurred at different times in different places, not as a single global event.