The shape of the yield curve for T-bills is downward sloping. What does it tell you about the expected state of economy in the future?

a. Economy will be in recession and investors will be selling safe bonds

b. Economy will be in recession and investors will be buying safe bonds

c. Economy will be growing and investors will be selling safe bonds

d. The state of the economy cannot be determined

e. Economy will be growing and investors will be buying safe bonds