Answer:
C. Advance Refunding
Step-by-step explanation:
Advance refunding is the situation that involves issuance of new bonds to repay issued bonds previously owed. Advance refunding is only possible after ninety days have elapsed. The major aim of advance refunding is towards reducing the issuer's debt. In the case of this question, the preferred shares can be converted to common shares. This is done in order to pay previously owed issued bonds.