Brendan Witt, CFA, does research about the Fisher effect. Which of the following statements is most accurate about the Fisher effect in the long term（）
A. Changes in the nominal interest rate are the result of changes in the real interest rate only.
B. Changes in the nominal interest rate are the result of changes in the expected rate of inflation only.
C. Changes in the nominal interest rate are the result of changes in both the real interest rate and the expected rate of inflation.
