The Next Two Problems Require the Bond Yield Spread Matrix

The next two problems require the bond yield spread matrix given below:
$$\begin{array}{l}\text { A BOND YIELD SPREAD MATRIX (basis points) }\\\begin{array} {| l | c | c | c | c | c | c | c | } \hline { \text { S\&P Rating } } & \text { AAA } & \text { AA } & \text { A } & \text { BBB } & \text { BB } & \text { B } & \text { CCC } \\\hline \text { Maturity } < = 10 \text { yrs; Non callable } & 34 & 52 & 69 & 107 & 236 & 415 & 687 \\\text { Maturity } < = 10 \text { yrs; Callable } & 58 & 72 & 102 & 150 & 304 & 456 & 530 \\\text { Maturity } > 10 \text { yrs; Noncallable } & 53 & 72 & 92 & 129 & 236 & 233 & \text { n/a } \\\text { Maturity } > 10 \text { yrs; Callable } & 110 & 106 & 131 & 166 & 290 & 433 & 530 \\\hline\end{array}\end{array}$$
-Using the bond yield spread matrix above, calculate the fair yield on a 20-year callable corporate bond that is rated "BBB" by S&P, given also that the yield on 20-year Treasuries is 5.55%.

A) 1.66%
B) 7.21%
C) 6.54%
D) 8.89%