GMAT Sentence Correction (SC) | Re: Arctic terns, being true long-distance migrants, they nest in coastal

Arctic terns, being true long-distance migrants, they nest in coastal wetlands of northern Europe but fly south for thousands of miles to spend the European winters in Antarctica.

A Arctic terns, being true long-distance migrants, they nest in coastal wetlands of northern Europe - 2 subjects - Arctic terns and they . Being is awkward here
B Arctics terns are true long-distance migrants, nesting in coastal wetlands of northern Europe, - Wrong modification using Verb- ing . Illogical sentence -
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