Your savings account pays 7 percent per year. Each 5100 in the bank grows to $107 over a one-year period. If prices increase by 5 percent per year, by keeping $100 in the bank for a year you actually gain

Which of these is the most likely way long-term economic growth takes place? a) increases in interest rates b) increases in overall price level c) increases in labor productivity growth d) increases in labor force participation rate