Which detail best develops the author's claim that the narwhal is a very unique animal?
OA.
"it is different from all other toothed whales in that it has no teeth in its mouth"
OB.
"narwhals have adapted to be one of the deepest diving marine mammals"
OC.
"Scientists believe the narwhal's intense winter feeding period may be an adaptation"
OD
"They live in remote places, far from civilization, in a habitat that is dark"
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