【单选题】X fails to perform their obligation and Y seeks to exercise the right of mortgag.Which of the following ways, in relation to the various ways for dealing with the mortgaged property, is NOT permissibl...
A.
The mortgaged property may be converted by auction
B.
The mortgaged property may be converted by being sold off
C.
Parties may agree upon the means of realising the mortgage right
D.
Parties may agree that the mortgaged property be used for offsetting the debts as per its value in the mortgage agreement