Final answer:
A sale and purchase agreement is an express contract with clearly stated terms that are agreed upon by the parties involved in the transaction.
Step-by-step explanation:
A sale and purchase agreement is a type of contract used in real estate transactions. This agreement outlines the terms and conditions for the transfer of property ownership. When considering the options given, the correct answer is B) express. An express contract is one where the terms are clearly stated and agreed upon by the parties, either verbally or in writing. A sale and purchase agreement typically includes details about the item being sold, the purchase price, and the terms and conditions of the sale, making it an express contract.