This is punctuated correctly.
"Marshmallows are my favorite snack" is a complete sentence unto itself.
The comma instead of a period shows that the sentence spoken is part of the whole sentence, which includes the speaker (she) and a word to describe how the speaker said it (explained).
Answer:
i never read any of those books
Explanation:
A) It represents the kindness and decency of the speaker's father, which the speaker admires.