Choose all of the following that are true

a.

generally issuers need to change their financial statements to reflect changes in a bond's value subsequent to its issue

b.

bonds may be able to be redeemed before maturity

c.

debt covenants protect creditors by restricting activities of borrowers

d.

lessees are required to recognize short term (less than 1 year) leases as on-balance-sheet obligations

e.

long term leases offer an alternative to purchasing, but the lessee has to recognize an asset and a lease liability at inception of the lease

can you also explain why the answers are correct