As shown in the text, the relationship between T-bill interest rates and the U.S. inflation rate can be described best by which of the following statements? A. T-bill rates are, by definition, always higher the U.S. inflation rate. B. Inflation rates often exceed T-bill rates, but not always. CT-bill rates have no relationship with the U.S. inflation rate. D. T-bills rates are typically slightly above the inflation rate, but the inflation rate sometimes is higher