Which of the following statements is CORRECT?

a. A bond is likely to be called if its coupon rate is below its YTM.

b. A bond is likely to be called if its market price is below its par value.

c. Even if a bonds YTC exceeds its YTM, an investor with an investment horizon longer than the bonds maturity would be worse off if the bond were called.

d. A bond is likely to be called if its market price is equal to its par value.

e. A bond is likely to be called if it sells at a discount below par. Please, explain why?