Respuesta :
Based on the question given, the best answer for this would be:
“At ninety-nine they began to call him well-preserved; but unchanged would have been nearer the mark.”
This sentence explains the youthfulness of Bilbo Baggins because in time people have not noticed him age, and that it was clear that he is left unchanged.
The line that best highlights Bilbo Baggins' unusual youthfulness is "At ninety-nine they began to call him well-preserved; but unchanged would have been nearer the mark." (option C)
Bilbo's youthfulness
In "The Lord of the Rings," the character Bilbo Baggins does not seem to age. As a matter of fact, he ages very slowly because of the special ring he carries around with him all the time.
His unusual youthfulness is shown in option C, with the lines that explain he looks no different at the age of ninety-nine than he did when younger.
Learn more about Bilbo Baggins here:
https://brainly.com/question/18810561