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.
Readers are able to relate to the narrators message
Simple....
A few good ways to talk about yourself--->>>
To mention a few things...you could talk about your personality, your hobbies, what kind of a person you are (charismatic, intriguing), what you love to eat, your family, just you in general; don't be shy...it's you you're talking about, and you know yourself more than anyone else!
Thus, your answer.