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Verbal·Information and Ideas·Central Ideas and Details

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The naturalist Rachel Okafor spent a decade studying the migratory patterns of Arctic terns, birds that travel farther each year than any other animal on Earth. Okafor’s tracking data revealed that individual terns do not always follow the same route twice, suggesting that their navigation relies on more than fixed instinct alone.

Which choice best states the main idea of the text?

A

Arctic terns migrate farther than any other animal.

B

Okafor’s research suggests tern navigation may be more flexible than previously assumed.

C

Okafor spent ten years studying birds.

D

Terns never repeat a migratory route.