I think kids should actually, it keeps them separated from distractions by other kids.
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).
The answer is A the largest.
Found this on http://www.shakespeareswords.com/