Which of these best serve as a topic sentence for the opening paragraph of a speech? a) his affection for this ship is best reflected in his choice of her as the site for his retirement ceremony. b) in saying goodbye today, we bid farewell to one of the very last of a generation of officers who began their service in the vietnam war. c) after flying numerous combat missions in that conflict, fox went on to spend twenty four years in flying assignments as a flight officer and logged more than 1,300 carrier arrested landings. d) in 1991, as mike indicated, he commanded a carrier air wing aboard this ship during the gulf war and in 1995 was the commander of the theodore roosevelt battle group as it supported nato operations in bosnia.