Which term is used to describe contractual terms that are specifically agreed upon?

The term "express terms" refers specifically to the contractual terms that are explicitly stated and agreed upon by the parties involved in a contract. These terms can be found in the language used in the contract documents, discussions, or negotiations preceding the agreement. They unequivocally outline the rights and obligations of the parties, leaving no ambiguity about the intentions behind those terms.

In contrast, "implied terms" are those that are not expressly stated but are assumed to be a part of the contract based on the nature of the agreement, the relationship of the parties, or statutory provisions. "Inferred terms" is not a standard legal term and may cause confusion as it lacks a recognized definition in contract law. Lastly, "unwritten terms" could refer to terms that are not documented but may also be implied or inferred, which again does not capture the essence of explicit agreement found in "express terms." Therefore, the correct answer emphasizes the clarity and deliberate agreement that characterizes express terms in contracts.