Concept:The speaker strongly denies an insulting accusation made against him.Explanation:The speaker furiously tells the other character, “Thou liest,” meaning “you are lying.”He then asks whether a coward could have drunk as much sack as he has drunk that day.This shows that someone has called him a coward.He rejects that charge completely, so the supposed “lie” is the claim that he is a coward.Answer:B. coward