On 1st April 2019, Joe purchased a zero-coupon bond that had just been issued by Rangoon Retailers Ltd. At issue, the bonds had a 10-year term to maturity. The face value per bond is $1,000.. At 1st April 2019, the bonds were priced in the market at a market rate of interest of 6% p.a. effective. One year later, on 1st April 2020, Joe sold the bond. On 1st April 2020 the bonds were being priced at a market rate of interest of 5.5% p.a. effective. Joe's return for the year was Select one: O a. 9.6 % b. 4.8% c. 10.6% d. 4.6%