Which type of contract includes all terms clearly stated and agreed upon by all parties?

An express contract is characterized by the clear and direct communication of all terms involved, making it essential that all parties explicitly agree upon the conditions outlined. This type of contract may be verbal or written but emphasizes that the terms are defined and acknowledged by everyone involved, leading to an unambiguous understanding of their obligations and rights.

In contrast, an implied contract arises from the behaviors or circumstances indicating an agreement, even if not formally articulated. A unilateral contract features a promise made by one party in exchange for the performance of a specific act by another party, without the necessity of a reciprocal promise. Constructive contracts, meanwhile, refer to agreements that are imposed by law to prevent unjust enrichment, regardless of whether a formal agreement existed or not. These distinctions highlight why the express contract stands out as the correct choice in this context.