Answer:
simple answer, listen to ur teacher and answer the questions!! if you need help, ask us!
A parenthetical statement must be set off using commas because it always (C) can be removed from the sentence without hurting the meaning.
Because of this, the parenthetical element is often also referred to as 'added information'.
I think it is A or B though I believe it is more likely A.
Professor because it is a person
My grandmother called but no one was home
