Which sentence is punctuated correctly?

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1 point
Sam likes to run marathons: the Boston Marathon: the New York Marathon: and the Iron Man Challenge.
Sam likes to run marathons: he is a talented painter.
Sam likes to run marathons: the Boston Marathon; the New York Marathon; and the Iron Man Challenge.
Sam likes to run marathons, he trains all year long.

Sam likes to run marathons: the Boston Marathon; the New York Marathon; and the Iron Man Challenge.