Mustufa ran 100 meter 200 meter races and the one he had trained for the hardest was the 400 meter competition. Which is the best revision of this sentence

The question is asking for the best revision of the sentence' Mustafa ran 100 meter and 200 meter races and the one he had trained for the hardest was the 400 meter competition. The best revision is this: Mustafa ran the 100, 200 and the 400 meter races competition; the one he had prepared hardest for was the 400 meter race.