The comma is after a kind of letter like Yes or No a sentence, so the answer would be B. Believe it or not Joe, it is for us to leave.
The Death of A close friend is most likely to be the subject of an elegy!
I hope this helps!
I would say C because this passage talks about green building and how it's beneficial. Sentence 4 mentions about what the green roofs are made of and I don't think that would be necessary to include in this passage.
Because it has something covering it and he has to watch his back
