16) Choose the most effective sentence combination that uses correct punctuation.
My great-grandfather received a Bronze Star in World War II. He is sitting over there.
My great-grandfather received a Bronze Star in World War II, that is sitting over there.
Who is sitting over there, my great-grandfather received a Bronze Star in World War I.
My great-grandfather, which received a Bronze Star in World War II, who is sitting over there.
My great-grandfather, who is sitting over there, received a Bronze Star in World War II.