Which type of will is written entirely in the testator's handwriting, signed, and dated?

The correct answer is the holographic will, which is a type of will created by the testator's own handwriting. For a holographic will to be valid, it must be entirely written, signed, and dated by the individual making the will. This form of will eliminates the need for witnesses, which is a requirement for other types of wills. Holographic wills are often recognized in many jurisdictions, including Minnesota, as legitimate documents reflecting the testator's intent to distribute their property upon death.

The other types of wills outlined have different characteristics. A witnessed will requires the presence of witnesses during its creation to validate it, while a non-codified will does not typically refer to a specific type of will recognized by law. Nuncupative wills, or oral wills made before witnesses, are often limited in their legality and acceptance. Therefore, understanding the unique attributes of each type of will helps establish why the holographic will is the answer to this question.