Fixed Assets Are Used as Security for a Bond

Fixed assets are used as security for a bond. 2.A given bond is subordinated to other classes of debt.
3) The bond can be converted into the firm's common stock.
4) The bond has a sinking fund.
5) The bond has a call provision.
6) The indenture contains covenants that restrict the use of additional debt.

A) 1,3,4,6
B) 1,4,6
C) 1,2,3,4,6
D) 1,2,3,4,5,6
E) 1,3,4,5,6