Which of the following refers to unspoken guarantees in a contract?

The term that refers to unspoken guarantees in a contract is indeed implied warranties. These are not explicitly stated within the contract but are understood to exist based on the nature of the transaction and the surrounding circumstances. Implied warranties are typically based on the expectation that certain conditions will be met, such as the product being of satisfactory quality or fit for purpose.

For instance, when you purchase a product, there is an implied warranty that it will work as expected and meet basic safety and performance standards, even if those guarantees are not written out in the contract. This legal recognition helps protect consumers by ensuring that sellers are held to certain standards, reflecting a general assumption about the quality of goods and services being provided.

In contrast, express warranties are those explicitly stated in the contract, statutory warranties are those mandated by law, and inferred warranties is not a standard legal term in this context. Each of these options represents a different aspect of contract law, but implied warranties specifically speaks to those guarantees that exist without being overtly detailed.