What purpose does a 'last will and testament' serve?

A 'last will and testament' serves the primary purpose of detailing how an individual's assets should be handled after their death. This legal document specifies the distribution of property, assets, and other financial matters, ensuring that the deceased’s wishes are honored and reducing the potential for disputes among heirs. By clearly stating who receives what, it helps facilitate the probate process, which is the legal procedure of validating the will and administering the estate.

While a last will can indeed include provisions for guardianship of minors, funeral preferences, and sometimes can touch on healthcare decisions, these are not its main function. Instead, the overarching and defining characteristic of a last will and testament is its focus on the distribution of assets and property following someone’s passing. This distinction highlights why option C is the most accurate choice in the context of this question about the main purpose of a last will.