Astro's debenture has 10.50% current yield. The bond has 8.00% annual coupon interest paid quarterly with $1,000 face value. The bond has ten years to maturity. Assume the market's required yield to maturity of bond with similar risk characteristics is 11.00%. What is the expected rate of return on Astro's debenture? Select one: a. 10.60%. b. 12.14% c. 11.92%. d. 13.17%.