Suppose Allied Company's bonds had a deferred call provision that permitted the company, if it desired, to call them 10 years after their issue date at a price of $1,100. Suppose further that market interest rate had fallen and that 1 year after issuance, the going market interest rate had declined, causing their price to rise to $1,494.93. What is the yield to call (YTC)? a. 10.0% b. 9.6% C. 4.21% O d. 7.5%