Answer:
It is this one: China's one-child policy has had an impact on families since it was instituted in 1970 to control population growth.
Explanation:
undoubtedly a hero because he saves many of his men from the cyclops, he rescues his men from Circe, and he ventures into the House of Death alone. Odysseus in The Odyssey by Homer is a hero because he saved many of his men from the cyclops, Polyphemus.
I believe it's antecedent. There's no commas anywhere so it shouldn't be an appositive phrase.