We are given with a statement given above. The answer is D since there is no erratum involved in the sentence. Children is already plural hence placed after n. Monkey bars and swings are not in the state of owning something so there should not be any apostrophe placed.
I don't know what story this is from or what is really happening; however, from what I can tell, the author uses the phrase "the annals of parental vigilance" to heavily imply that Daisy's parents are extremely rigid in how they raise her, in an orthodox fashion. "Annals" is defined as yearly record keeping, and "parental vigilance" means that the mother is one that is always watching and correcting her child (from what I can tell.
Phaethon goes to Apollos place to find out if the sun of god is his father.
Mrs. Mallards excitement at the prospect of a new life