Concept:The sentence describes how a millionaire lives, so the correct word must relate to wealth or prosperity.Explanation:"Affluence" means the state of having a great deal of money or wealth.A millionaire is rich, therefore he lives in affluence."Prudence" means careful management of resources, "frugality" means being economical, and "abundance" means a large quantity.Only "affluence" specifically matches the lifestyle of a millionaire.Answer:B. affluence