Which of the following is most likely an example of two organisms in the same species?

A.  A cabbage in Georgia and a cabbage in Missouri that mate and produce fertile offspring only in years of unusual weather patterns.

B.  Two fruit: flies on the same Hawaiian island with very different courtship dances.

C.  Two South American frogs that mate in different seasons.

D.  Two migratory birds that nest: on different: islands off the coast of England.

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