GRE RC Doubt || Pan American land bridge or isthmus

Part-1
part-2

Hi

Please help me understand whether the below option can be inferred from the attached passage

Option B: The divergence in ocean temperature during the formation of the Pan-American isthmus resulted in a divergence in the ocean’s nutrient value.

I am unable to find a connection in the passage that defines the cause and effect relationship between divergence in ocean temperature and divergence in nutrient value.

Answer choices select option B as an inference.

Please review and help.

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