Final answer:
The correct term for the person designated by the original fee simple owner after a life estate ends is the remainderman, who holds the remainder interest.
Step-by-step explanation:
The original fee simple owner who grants a life estate may designate another person, called the: A. Remainderman. The remainderman is the person who holds the remainder interest, which is the future interest that becomes possessory when the life estate ends, often upon the death of the life tenant. B is incorrect because the life tenant is the individual who holds the life estate and has the right to occupy and use the property for their lifetime. C is incorrect as reversionary interest holder would typically refer to the original owner if they retained the right for the property to revert back to them after the life estate ends. D is similar to A, but is not a term regularly used in legal terminology; the correct term is remainderman.