GWD32-Q5

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
            

B.       Arctic terns are true long distance migrants, nesting in coastal wetlands of northern Europe

C.      Being that they are true long distance migrants, arctic terns nest in coastal wetlands of northern Europe
            

D.      Nesting in coastal wetlands of northern Europe, arctic terns are true long distant migrants

E.       True long distance migrants, arctic terns nest in coastal wetlands of northern Europe
            

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answer E, why not D?