Norman agrees to purchase Gusela's property for $85,000. He deposits the purchase price with Vincent, and Gusela deposits a warranty deed for the property with Vincent. Vincent is instructed to record the deed in Norman's favor when Gusela shows good title to the property. Vincent is also instructed to pay the purchase price, less some agreed prorations, to Gusela when Norman has received the deed, this transaction is called
a. option.
b. installment sale.
c. provisional sale.
d. escrow.