What are the general requirements for a will to be valid in most jurisdictions?

The correct response is that the testator must be of sound mind and at least 18 years old, which reflects the fundamental requirements for a will's validity in most jurisdictions.

To be legally valid, a testator must demonstrate testamentary capacity, meaning they understand the nature of making a will, the extent of their property, and the beneficiaries to whom they are leaving their assets. Additionally, the age requirement ensures that the testator is considered legally capable of making such significant decisions regarding the disposition of their property. Typically, 18 years old is the minimum age in most jurisdictions, although there may be exceptions, such as in certain states where individuals can create a will at a younger age if they are married or serving in the military.

In contrast, the other options outline conditions that do not apply universally. While some jurisdictions may recognize one witness for a will's validation, other jurisdictions require at least two witnesses. The requirement for notarization varies: while it can enhance the credibility of a will, it is not universally required for its validity. Finally, a separate affidavit is not a common requirement for wills; rather, affidavits may be used in specific situations such as proving the validity of a will in probate court but are not a standard requirement