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The extinction of dinosaur took place

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before the origin of seaweeds

before of the origin of first amphibian.

when the rise of modern fishes, birds, and placental mammals were seen.

after the the origin of turtles

answer is C.

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Detailed Solution

About 65 mya, the dinosaurs suddenly disappeared from the earth. Around the same time, placental mammals and modern fishes and birds evolved.

One of the hypothesis is that dinosaurs have evolved into birds.

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