A 'Kustingbrier' is best defined as:A. This can be established only with regard to a particular immovable thing example. land and cannot be established over all immovables of the debtors in general.B. a special mortgage over an immovable thing to secure a principal debt incurred in respect of the purchase price of that thing.C. Irvestment companies obtain money from investors and lend this combined amount obtained against security of a mortgage bond over immovable property of the debtor.D. a special mortgage which secures a future debt. In order to secure a future drbt, the maximum amount must be stated and the special mortgage must be declared.