For a contract of sale of a piece of land to be perfected and enforceable between the parties:
A. The sale must be in a public instrument and recorded in the Registry of Property.
B. The sale must be in a public instrument and the price must be paid in full.
C. The sale must be in a public instrument and the piece of land must be delivered.
D. It is sufficient that the sale is in a private instrument although the piece of land has not been delivered and the price has not been paid.