Question 25 3 pts Which of the following is true? O a. The relationship between the duration of a bond and the remaining maturity of the bond is a positive relationship, assuming all other things are held constant. O b. The relationship between the duration of a bond and the coupon interest rate on a bond is positive, the higher the coupon the higher the duration, assuming all other things are held constant. O c. The relationship between the duration of a bond and current market yields is positive, the higher the market yields on bonds the higher the calculated duration, assuming all other things are held constant. both a and b are true. O both a and care true