What is the definition of a callable bond?

(pick one answer only)

A. Borrower can pay off bond early at a specified call price.

B. Bonds that are not backed by collateral

C. Bond issue that matures (principal due) in installments

D. Bond issue that matures (principal due) on a single date.

E. Bonds that are backed by collateral

F. Lender can convert bonds into a specified number of shares of common stock.