The correct option is D own
In this sentence, we need to fill the blank with an adjective of the given form.
Option A: Is a wrong word
Option B: It is a noun which defines the act, state, or right of possessing something.
Option C: It is also a noun use to define a person who owns something
Option D: can be used as an adjective, pronoun or a verb. When it is used as an adjective, it is used with a possessive to emphasize that someone or something belongs or relates to the person mentioned, which is the case over here
Option D is the correct answer.