Which of the following statements is correct? a. Fewer than three percent of families are categorized as poor for eight years or more. b. Most workers have about the same income (adjusted for inflation) when they are young as when they are middle-aged. c. In the United States, the grandson of a millionaire is much more likely to be rich than the grandson of an average-income person. d. The majority of millionaires in the United States inherited their wealth