Which of the following has the least interest rate risk? a. A six-month unsecure

Which of the following has the least interest rate risk? a. A six-month unsecuredpromissory note from International Harvester b. An eight-year investmentcertificate from a federally insured bank c. A 15-year U.S. Treasurybond d. An AT&T bond maturingin 2010 Interest rate risk is the possibility that rateswill change.