The current U.S one-year Treasury bill yield is 1.81% and the inflation rate is 1.70%. The 10-year treasury bon yield is 1.71%. Which of the following is correct?

a. The real short-term risk-free rate is 0.01%

b. the short-term risk-free rate is 1.71%

c. The maturity risk premium on the 10- year bond is 0.10%

d. the 10-year yield has inverted.