Yes this a very good poem and it does include alliteration and 3 Onomatopoeias :D
C is the answer because it’s basically describing the person actions and how their day went . (some what basically writing like it’s a journal)
A. Fiction and non-fiction can have a persuasive purpose.
It doesn't just have to be one genre, you just have to make it interesting, to grab the readers attention. That's basically what persuasive means.
There is a metaphor in B) She offered him a hundred-watt smile.
A metaphor is used to compare two unlikely things without using the words, like or as. Here, the woman's bright smile is being compared to a light bulb!