which sentence all punctuation correct years triathlon will consist running ten miles swimmi

In which sentence is all punctuation correct? This year’s triathlon will consist of: running ten miles, swimming one mile and biking twelve miles. This years triathlon will consist of running ten miles, swimming one mile and biking twelve miles. This years’ triathlon will consist of running ten miles, swimming one mile and biking twelve miles. This year’s triathlon will consist of running ten miles, swimming one mile, and biking twelve miles.

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