Under which of the following circumstances would a decedent be considered to have died intestate?

A$.$The decedent wrote out a will by hand, but did not sign or date it$.$

B$.$The decedent was of "sound mind" when he signed his statutory will.

C$.$The decedent prepared a last will and testament, witnessed by a neighbor.

D$.$The decedent prepared a reciprocal will with his attorney $6$ years ago.