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题目材料:

For the following question, consider each of the choices separately and select all that apply.

With which of the following statements about Azolla fern spores would the scientists mentioned in the second sentence be likely to agree?
  • AThe Azolla fern spores found in 50-million-year-old material originated in rivers or lagoons.
  • BDischarge from rivers created an environment that impeded the release of Azolla fern spores in the Arctic Ocean.
  • CThe large quantity of Azolla fern spores present in the materials underlying the Arctic Ocean indicates that the ocean was once an ideal environment for the growth of these ferns.

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