Which statement is false? a. The variability of the coupon rate on a Libor-based floating-rate bond is most likely due to market-based reassessments of the issuers creditworthiness. b. Coupon income of most municipal bonds is exempt from state and federal income taxes c. Bonds with public offerings are more liquid than those with private placements. d. Floating rate coupon bonds have lower interest rate risk than fixed rate coupon bonds for investors.