Which of the Following Is Not a Covenant of the Mortgagor

Which of the following is not a covenant of the mortgagor?

A) to keep the property adequately insured in the name of the mortgagee
B) to keep the premises in a reasonable repair
C) to pay the taxes on the land the buildings
D) to pay the debt and accrued interest, at the stipulated times
E) to execute the necessary discharge of the mortgage upon payment in full