In Order to Purchase an Interest in Piece of Land

In order to purchase an interest in piece of land called Blackacre, Rhiannon borrowed $100 000 from Nick.As security for the repayment of that loan, she entered into a mortgage over a piece of property.Which of the following statements is TRUE?

A) It is possible that Rhiannon gave a mortgage over a diamond ring that she owned.
B) The transaction must have occurred in a registry system.
C) Rhiannon must have purchased Blackacre from Nick.
D) Rhiannon must have purchased the fee simple in Blackacre.
E) Blackacre must be the property that is subject to the mortgage.