Which of the following is true regarding the enforceability of contracts?

The enforceability of contracts can indeed encompass oral, written, or implied agreements, which makes this choice the correct one. In many jurisdictions, the law recognizes that contracts can be formed without a written document as long as there is mutual consent and consideration between the parties involved. Oral contracts can be enforceable, depending on the circumstances and the type of agreement. For instance, agreements related to the sale of goods under a certain value may not require a written form to be valid.

Additionally, implied contracts arise from actions or circumstances rather than from explicit verbal or written agreements. For example, when a person orders food at a restaurant, there is an implied contract that they will pay for the meal, even though no formal written contract exists.

Other options describe conditions that are generally not necessary for a contract to be enforceable. It is not true that contracts always need to be written; some agreements can be valid even if they are verbal. Notarization is typically not required for contracts to be valid, although having a notarized document can provide additional legal protection and is sometimes needed for specific types of contracts under certain laws. Lastly, while some terms of a contract must be stated for clarity, it is not necessary for all details to be explicitly outlined; certain