A Romalpa Clause in a Contract for the Sale of Goods

A Romalpa clause in a contract for the sale of goods:

A) allows the seller to retain possession of the goods until the buyer makes the full payment.
B) retains full title in the goods to the seller until the buyer makes the final payment.
C) gives the seller an equitable interest in the goods until the buyer makes the full payment.
D) voids the common law nemo dat rule.